I'm not the biggest Bond fan and I was skeptical when Craig was selected but I loved Casino Royale. It had the right mix of pulse pounding action, intrigue, and romance. Whereas the action in Quantum of Solace was more mindless, there wasn't much of a plot (one that made sense anyway), and Bond seemed so cold and remote (albeit with reason I suppose) that it didn't work for me. He was killing people without interrogating them first and then just lucking up too much as he went along.
His seduction techniques with Agent Fields (who didn't even mention her first name for him to make an entendre or something about) was lame, he didn't bed Camille, and the villains mostly sucked, except for Medrano. CR was a nice intro, but QoS was a weak follow-up. That being said, I would like them to finish out this trilogy. It seemed like Bond went through an awful lot in Quantum to just discard Vesper's memory like he did. That was such an unsatisfying ending.
Actually I love the ending of QoS, and I don't think Bond is discarding the memory of Vesper, in throwing away the necklace he's throwing away his need to get revenge for her death- actually I like the bookending that CR begins in snowy Eastern europe and QoS ends there, that Bond has gone from loose cannon to trusted agent, from the man who couldn't see the bigger picture to the man who didn't kill Vesper's boyfriend because he wasn't important enough and was worth more alive.
Maybe I'm biased because I don't follw the accepted path that CR is brilliant, very good yes, but not really a Bond film and far too long and badly paced. Personally I thought QoS far a far more traditional Bond. The villain had a nefarious scheme (more nefarious than 'win some money at cards') Bond jetted around the world in seconds, he was up against a slightly ridiculous organisation, seduced the pretty young girl who ended up being horribly murdered, and the villain had a secret base (cue the exploding hotel) The Bond music was there, if you listened for it, and the humour was there too, it's just that--like Dalton--Craig suits a dryer, less obvious one liners. Plus Camile had more personality and backstory than the horrendously miscast Eva Green. Best of all QoS didn't take two and a half hours and feature multiple endings...
I don't think we've seen the best of Daniel Craig yet though, but he continues to be the best thing about the new Bonds (and this is said as someone who hated him when he was cast)