Season 6, Spike.
Maybe not as weak as Bella, but she was always teen-angsty, with entire episodes revolving around her and Angel's romance.
What's wrong with being teen-angsty? Angst is an inevitable part of adolescence, I wouldn't believe a movie/show about teenagers without angst.
Twilight doesn't have teen angst. More like, teen boredom. I admit I never actually sat down and watched the whole movie from start to finish, but from what I've seen, it is incredibly boring and barely anything ever happens, Bella and Edward are both totally bland and dull characters, and Bella is a total Mary Sue: the moment she appears at her new school, everyone is mad about her, girls are desperate to be her friends and boys are all crushing on her, despite her being lifeless and dull and not even especially attractive (though that's a matter of taste) and generally not standing out in any way. Yeah, like that normally happens. Total wish fulfillment.
By contrast, when we meet Buffy, she was confident, witty, smart, warm, bubbly and full of energy, not to mention hot, and it is far more believable why Xander would fall for her immediately and why Cordelia would at first want to be friends with her - but that doesn't help her not become incredibly unpopular as soon as she does something 'freaky' (i.e. slay vampires) and Cordelia spreads the rumors about her being a crazy freak. It wouldn't say that
Buffy was 100% realistic in its depiction of high school life (it wasn't even trying to not have everyone in high school look attractive and in their 20s and witty), but most of the time it was very true to high school experience and its less pleasant sides - like bullying, being an outcast, kids being pushed too much and abused by their ambitious parents or coaches, etc.
I can see why one would compare Bella/Edward to Buffy/Angel - because the former at moments seems like a parody of the latter, like early Bangel misunderstood and devoid of any sense or depth or poignancy or ambiguity: a teenage girl falls in love with a mystery guy who turns out to be a vampire; he acts stalkery, he says he likes to watch her sleep (Angel says he likes watching Buffy sleep in season 1 'Angel' when they happen to spent a platonic night together); Bella says she isn't bothered by him being a monster, while Buffy was trying to convince Angel in mid-season 2 that she wasn't bothered by him being a vampire. But that was after Buffy had known Angel for several months and after he had proven himself to be a good guy and helped her and her friends several times, she wasn't saying it to a guy she had met mere hours before. When Buffy first met Angel, she was first quite annoyed by him, because he would appear out of nowhere to warn her of some danger and then disappear, and she was snarky and hostile. And if Angel had told her that he had been watching her sleep for months before she even knew him, I imagine she would have been freaked out. She actually does call him a stalker once, even if it was in her 'bitchy' PTSD phase. Bottom line, Buffy may have acted like a swoony teenage girl at times, but she was never a complete idiot or weak like Bella. Her falling for Angel was far more convincing, as was Angel falling for her. Buffy is not just a girl with 100 more strength and personality than Bella, she's also the Slayer, which makes her extraordinary in any case, and we later learn that Whistler showed her to Angel and told him to help her, which all explains his obsession with her. Edward, on the other hand, is obsessing over Bella just because. And while there were schmaltzy aspects to B/A (which, however, were only taken to silly levels by shippers and media like Entertainment Weekly that started calling B/A "soulmates", "one true love", "forever love" etc. that the shows never did, except in a satirical way), there was also a lot of subversion (there are lots of times when Angel could be seen as a romantic hero or a creepy older guy stalking a teenage girl, and after he loses his soul in S2, many of his earlier actions like watching Buffy sleep or following her around are seen in a much darker way) which must have gone over the heads of people like Stephenie Meyer. The whole Bella/Edward romance happens out of the blue and is completely unbelievable, the two of them don't even know each other, but we're supposed to think that they love each other just because.
Buffy is vulnerable and can be affected by her emotions, especially when it comes to romance/sex, but that's not the same as being weak. She wouldn't be an interesting character if she didn't have believable human weaknesses and if she didn't struggle between duty and her feelings, but every time she displays a weakness (being scared of dying at the hands of the Master, wanting to be more traditionally 'feminine' in order to be more attractive to Angel in
Halloween, not being able to kill Angelus in
Innocence, falling for a manipulative jerk like Parker, Dracula's thrall, her depression, getting involved with Spike despite her better judgment...) the outcome of the storyline is her overcoming it and taking the power back. She certainly wasn't anything like Bella with Spike; if she had been like Bella, she would have been more than happy to continue their relationship and would have been cooing about what a wonderful guy he was and how she didn't mind him being an unrepentant mass murderer. Buffy is never like that, unless there are magical influences involved in addition to despair and being in a bad emotional place. *cough season 8 cough* And when Buffy does have her weak and stupid moments, it is unambigiously shown to be a very bad thing - season 8 was described as Buffy betraying herself.
Bella doesn't have any strengths that would make her vulnerability interesting. And her behavior doesn't even make sense, she barely seems human. I wouldn't mind it that much that she was weak if the narrative portrayed it as a bad thing, if it was supposed to be a warning how women can let themselves be victimized because of romantic cliches that the society has taught them. Maybe if Bella was portrayed as a girl who was a lonely outcast and deeply insecure about herself, someone who thought nobody could find her attractive (like season 1 Willow), and maybe if her father paid no attention to her, if she was a girl desperate for someone to pay attention to her, then it would be a lot more believable why she could find Edward's stalking attractive. But as it is, everyone in the school is swooning over her and she doesn't even care. So why is she like that with Edward? And what's the worst is that it seems we're supposed to believe that Bella and Edward are twu wuv and find all this incredibly romantic, rather than really creepy.
And of course, there's the fact that the movie itself, as far as I was able to bear watching it, is incredibly boring, with barely any plot, not to mention the lack of any good dialogue, humor or wit. Compare it to any BtVS episode and the difference is startling.
The first movie had an interesting directorial tone to it, so it's a memorable film. As soon as it was a big success the studio dumped the director. I have no idea what the later movies are like.
Pattinson is certainly a more appealing and talented actor to play the male lead than, oh, David Boreanaz (who isn't?). That said, I prefer James Marsters.
I prefer James Marsters to David Boreanaz, too, but I certainly prefer DB to Robert Pattinson (or at least to Pattinson playing Edward; I don't know what he's like in other roles). Yes, DB was quite wooden in season 1 and part of season 2 of BtVS, but he got much better later on, especially on his own show.