I've seen Quantum of Solace
It was ok. A good romp. But the first film was better.
Daniel Craig absolutely can and does do gentle. He's been in some fabulous tv dramas over here (Our Friends in the North was a highly acclaimed drama in the 90s and is still referenced as a high point in tv drama). I've seen him in a broad range of stuff, playing very different character types. He's very well-known over here as a serious actor. Daniel Craig the big budget movie star is quite a new phenomenon :P
If you see him in interview he's actually a very gentle man.
Talking of which. Here's an interview from 2007, on the Johnathon Ross show (Rossy is probably the nearest equivalent we have to Letterman).
One of Craig's finest performances was in a little drama called Some Voices, in which he plays a schizophrenic who is struggling to cope with life, looked after partly by his long suffering brother (David Morrisey). His character (Ray) meets and falls in love with a woman. The film is a love story and also a story about brotherly love and responsibility.
scenes from Some Voices:
Scenes from Our Friends in the North