Oddly enough I haven't seen topic like this here, so I will be first to start. In this thread we post things and features from our favourite RPGs we'd love to see in Project Eternity. I'll start with few games I have known and loved very dearly.
Fallout 1&2:
-Humour (some might find it bit childish though)
-Very high verbal quality of dialog
-Ability to talk your way out of most conflicts (if having necessary stats&skills)
-Very free exploration (esp. Fallout 2)
-Ending slides
-Refreshingly daring take on sex (especially for it's time)
-Random encounters (funny and scripted ones, not boring monsters-only ones)
Baldur's Gate 1&2:
-Cities that feel big
-Characters (some might find some of them annoying though)
-Banter
Planescape Torment:
-Philosophy
-Story of personal exploration and rediscovery
-Nice bestiary
-Very alien world (planescape is interesting setting)
-Ability to lots of interesting things through dialogue
-Characters (very bizarre and unique, but very lovable)
Arcanum:
-Lots of Choices and Consequences
-Ability to create very diverse characters
-Race, gender and sometimes even clothes having profound effects on dialogue
-Raise spirit ability (sadly underused by game)
-Some great characters (ie. Geoffrey, Torian Kel, Magnus and most of voiced ones, aside Virgil)
-Interesting lore flavouring books
Morrowind:
-Lots of unique loot
-Interesting books (like Arcanum, but lot of more)
KotOR 1&2:
-Full-blown evil path (even if just silly puppy kicking in KoTOR 1)