Sims 1: Making Magic
To be fair, it's been a while since I played TS1, I started late and got most of the packs together, so I can't remember which tracks came from where, but the music from Making Magic always stood out, and I still listen to it today.
Sims 2: Seasons
The neighbourhood theme is so beautiful... Too bad I can't sing, because I wrote a song for that melody back then.
Sims 3: -
Never played TS3, so I don't know.
Sims 4: Various
First of all, Eco Lifestyle. While most of the soundtrack in this game is rather upbeat, there's something about the CAS music from this pack that makes me feel warm and fuzzy. I also like the soundtracks from Vampires and Realm of Magic, and the main theme remixes from Seasons and Island Living.
