My list of favorites:

Planescape:Torment
Fallout 2
Divine Divinity
Baldur's Gate 2
Bard's Tale II & III

For us old timers - remember mapping on graph paper the Bard's Tale dungeons? The pitch black, anti-magic, teleporter zones were a lot of fun! One mistake and you start over mapping it out. I think they added the automapping in Bard's Tale III (it has been about 18-20 years ago since I have played it).

BTW: I had no faq's, forums, or hint/cheat guides for Bard's Tale II and III, but still completed both games all the way through. That's to hardcore for me now these days ;-).