Originally Posted by Arhu
Stones from the Ultima Series is one of my favorites as well, even though I have never (!) played one of those games (I know, shame on me).
Realms of Arkania
Catchy soundtrack, the hum-along kind.
Examples: A New Life Is Born (RoA1), Diary (RoA2) and Pondering in Solitude (RoA3)
Incredibly diverse and slightly melancholic music.
Example: Sighs Of The Elvenkind
Oozing with atmosphere.
Example: Tristram Theme
Actually, the Tristram Theme may be my most favorite of them all.
Arcanum gets an honorable mention because its soundtrack was certainly unique.