I still fire up Might & Magic 6+7 from time to time. They hold up for me.
Morrowind is also by far the best Elder Scrolls (IMO of course) and you can get mods to make the graphics better which is a plus.
+1 on Fallout 1/2 (i like them far more than 3), BG 1/2, DK 1/2, Arcanum (i just assume this is mentioned somewhere), Thief and of course the best strategy game ever TA (try supreme commander or an open source project called Spring if TA feels too dated). I had a lot of fun with Dark Messiah of Might & Magic, plays similar to Dishonoured and is made by the same devs.