Update: I was unfortunately not aware of Shamus Young's severe criticism of Fallout 3 available here to link in the original piece and I regret that. It dovetails rather nicely with what I've written and it's much better executed than my piece. I strongly recommend anyone...
I didn't like his one that much at all, in all honesty. They changed too much of it for me to really like. The graphics are a lot nicer than the first one, but again, they changed too much. For instance:
The Imps don't work as fast as they used to, kind of annoying really, even if you slapped them, they don't do a good fast job as they did in the first one
I also didn't like that they changed how the monsters looked either, or the fact that most monsters are "stunned" when dropped. Wtf kinda crap is that?! They certainly didn't do that in the first one! That's just plain annoying. It's why I didn't really play DK2 all that much. It annoyed me too much. I'm rating this one a C+, all it really has going for it is the better graphics and a few other little things.