And then there's ESO. Which should never be touched IMO.
Also, on topic, I've recently tried Arcanum: Of Steamworks and Magick Obscura. Definitely worth a try.
But why not ask our local Minor God, @Grey for advice on this matter?
Also, this is a must play.
MORRO-FUCKING-WIND!
If you haven't played this, DO ET NAO!
Seriously, it's one of the best games ever, IMO. The setting, the general feel of the world, the atmosphere, the freaking lore and books! Throw in some texture mods and kiss your social life goodbye.