Tyranthraxus
Well-known member
I would have to vote for Age of Conan; at times, it filled me with bravery, and also brought me to tears. 
Age of Conan soundtrack
Age of Conan soundtrack
I also enjoyed the ambience of Elwynn Forest. Nostalgia.Probably an unpopular choice, but I´ll go with World of Warcraft.
I just recently got back into playing Classic WoW and immediately got hooked on the music again. From the mysterious flutes in the Night Elf territories, to orchestral music when you enter Stormwind, or the war drums in Orgrimmar...
Can´t speak for the newer expansions, but classic WoW had great and fitting soundtracks in every territory.
(I didn´t play Age of Conan enough to really remember its soundtrack or feel nostalgic about it, but I think it was a good one as well)