For me Casino Royale isn't as good as its made out to be, whilst QoS isn't as bad, so I think they dovetail nicely together
Casino Royale is too long, and badly paced, they just try to jam too much into it and it doesn't always work. It's also essentially two films jabbed together, the first half and the second half. Some of the action scenes just go on a bit long (the pakour bit for example) whilst Bond's detecrtive work involves a lot of plot contrivences. So this blunt instrument can break into the head of MI6's apartment then hack into her laptop...riiight. And isn't it fortunate that Demitrius chose that moment on CCTV to send his text to the bomber (and frankly if that guy was his first choice its amazing he's stayed in business as long as he has--can you seriously see this guy infiltrating Miami airport like bomber #2 does?)
Daniel Craig is brilliant though, and he makes the film, pretty much perfect throughout (although a little too blank faced action hero in some sequences). Much like Dalton he's funnier than you think he is as well. It is to my eternal shame that I hated him when he was cast...a mistake I won't make again.
Two missteps of the film for me are Lechiffre and Vesper. Its a shame because I've seen Mads Mikkseson(sp) in other things since and he has quite a screen presense, but he's such a limp bad guy here! You should never, never have your villain sucking on his ashma inhaler that early in a film! The only time he comes alive is in the torture scene, plus you have to wonder why he's so bothered about the game once Bond has handily killed the man he owed money too?
And Vesper...is she French, is she English? Clearly Eva couldn't decide. It's hard to see why Bond falls in love with her, there is just nothing loveable about her, aside from the fact she's beautiful. I blame Fleming for this because the love makes zero sense in the book as well. Bond seems to fall for her in effect because she doesn't like him, whilst she falls for him because...well it isn't really made clear, her character just decides to fall for him. I wish the film makers had had the courgae of their convictions and had her kill herself, rather than giving us the exciting enough finale but one that doesn't fit with the tone of the film (which is all about mano a mano- snake vs mongoose, Bond vs Pakour, Bond vs Dimitrious, Bond vs Miami bomber, Bond vs Le Chiffre, Bond vs...er a bunch of goons?) It would have also cut the running time down a bit.
Have to love than final scene though!
QoS...well first off what's really good about it is that its a damn sight shorter than Casino Royale

I think if I had to use one word to describe it, it would be dirty. The film's very rough around the edges. Whether this was completly intentional, or a result of the writers's strike I don't know, but there's a gritty rawness to most of the film, that even extends to the title song, which isn't great but works in the context of the film. The shaky cam I find annoying as well, though with repeated watchings I actually rather like the opening car chase. I also quite like the running joke that Bond keeps killing people he should be interorgating!
Dominic Green isn't a great villain, but I actually like him better than LeChiffre, I really hope we get a good villain in the next film though. Again he's less the villain than some sort of middleman.
I like Camile, she fits the film perfectly, and it does make a refreshing change that Bond doesn't end up shagging her! He does at least get Agent Fields!
Poor old Fields, and poor old Mathis!
I love the opera bits, the fact that Quantum (dumb name) have a plan that's both rooted in the real world and ridiculous at the same time, and the fact that they have their secret meeting in the amazing exploding hotel! Now that feels more like a Bond film!
Love the final scene where 007 finds Vesper's boyfriend and saves Detective Kate Beckett...er I mean Canadian agent woman, from the same fate.
The two films bookend themselves wonderfully. CR starts in snowy eastern europe and ends in sunny Italy. QoS starts in sunny Italy and ends in snowy eastern europe! CR begins with Bond castigated for not seeing the bigger picture and killing the bomber in the embassy, while QoS ends with Bond seeing the bigger picture to such an extent that he doesn't kill the one man he really has most cause too!
One thing I've noticed in both films, and love, is a neat little quirk that Craig's given Bond and which probably a lot of people don't pick up on. Remember the bit in CR where he smashes the German's Range Rover? He throws the keys away in a really dismissive manner, and he does it all the time! Car keys, mobile phones, guns, people (Mathis, Camile), he uses things and people them discards them. It's a lovely little touch by Craig, making Bond a man who basically seems to have no ties to anything aside from duty.