Who develops anything alone? Even
BG is most likely one person's idea, but another
people's efforts. I too have a love of BG, though I secretly think that IWD holds a greater sway over me. That could be because I found it much easier to get into given the amount of time I had to play with.
I haven't really explored all of BG, so I keep putting off the move to BG:SoA. I've had that game and BG:ToB for over half a year now, and can see no significant attempt in sight to seriously begin playing. Maybe once I've completed BG again to my satisfaction.
Of course the other part of me says why bother if I can make a completely new character using the extended classes and edit the XP if I really wanted.