For me it would have to be KotOR and TSL.
The mods I am most looking forward to are:
Jedi Knight: Dark Forces II for JKA
Dark Forces for JKA
Shadows of the Empire for JKA
and one I'd love to see get back on track.
Not all those who wander are lost.-J.R.R. Tolkien
I believe in Christianity as I believe the sun has risen, not only because I see it but by it I see everything else - C.S. Lewis