With regards to Craig's physique, remember that this man is Ex-SBS, and his hobbies include climbing, skiing, diving, swimming and running. Add to that his high-octane adventures and it's only natural that the man would be lean. Craig does not have the body of someone who lifts weights while watching himself in the mirror. I believe he did a lot of circuit training in preparation for the part, and his workout for QOS was based around functionality rather than appearance. Although Craig trained for appearance in CR, it was to have the appearance of someone who doesn't exercise out of vanity, but because they are ex-military with a high-octane job and hobbies.
Fitness was very important to Fleming's Bond, I remember in OHMSS, Bond worries whether his muscles can cope with a quick getaway from Blofeld's HQ via skis, and begins working on them. We also know that Bond is rather lean, and exercises in the morning and (as I mentioned) his hobbies consist mainly of solitary sports.
I don't see why there's anything un-Bondian about the character being lean, it makes sense. It's not like the man has a clean lifestyle in the new films, he's over-indulgent as ever, watch the plane scene in QOS.
With regards to him smoking, I don't think it matters really. Cigarettes aren't 'cool' anymore, and are usually seen as a rather disgusting habit (no offense to any smokers on the forums). Not to mention that smoking is just awkward these days, it wouldn't represent Bond living life to the full, it would seem more like Bond was awkwardly being held back by an addiction. As many have said, however, I wouldn't mind him smoking a cigar, as they still seem somewhat elegant. I think we can still see (and have seen) his indulgent lifestyle without smoke, but it makes sense either way.
Edited by Iroquois, 21 April 2011 - 03:55 PM.