I never really played D&D as pen and paper, so computer games were more or less my introduction to the system. I did play one D&D game prior to BGII that ran on 2e. I always found the rules somewhat confusing and/or counter intuitive. Always thought 3e was much better in that regard, pretty straightforward. I never played anything based off anything newer than 3.5 though. From what I've read the newer versions are more like MTG than D&D :/.
I didn't expect them to redo the ruleset though. There's a lot of storyline changes that would have to be done too - just the removal of racial class restrictions alone changes quite a few things.
On a more general note, I'm liking the sudden realization that these old games aren't loved just because of nostalgia. There's something elegant and beautiful about the old style 2D pre-rendered scenes and isometric views.
Can always use an old monitor :P. I still manage a pile of old 13in CRTs at work precisely because of old software.