For the sake of music alone (especially if you're a SoundTeMP/SoundFA fan like myself), I'd recommend RuneScape (non-SoundTeMP work, but still somewhat catchy), Ragnarok Online, Granado Espada and Flyff.
Even RO or Flyff don't really interest you, a great benefit of downloading the game is complete access to their wonderful soundtracks, some of which may inspire YOU!
RuneScape's where I started MMORPG'ing and it's evolved quite a bit over time. There was a time the game used to use your MIDI chip for music playback, which I thought was rather neat, depending on the quality of your soundcard. Now, they've changed it up with some proprietary MIDI music, which as of the latest version, I hadn't really enjoyed that much, but that aside, there's quite a lot to do in RuneScape, and there seems to be ever more that's being added to the game.
Personally, I miss Trickster and Fiesta, and I guess for good measure, Secret of the Solstice. They were great MMOs (leave it to Korea when it comes to sweet computer MMOs). Fiesta is one which I believe I enjoyed the most. Unfortunately, the game's been handed over "temporarily" to another host site, and I haven't had much interest in the game since. SoS was a neat Ragnarok clone, though there were some visual differences and features that made it rather unique. Trickster was a neat hand-drawn 2.5 D game, that I never really caught on with, but nonetheless had nice music.
Planeshift's another one which is still technically a W.I.P., but seems to have some potential (don't quote me on that, as I believe I haven't even left the tutorial area yet!). When it comes to music here, it's perhaps one of the few out there where its songs were contributed by players of the game.
I myself haven't really had much time to play any games of this type in a while, but if you're interested in ANY of the ones i mentioned above (sans the three "dead" ones), PM me, and I'll add you to friends lists and stuff.
kkots
Fan me! Buy my music!
Links to stores!
Original soundtrack on CD released!
...
Do you have anything besides work on music? Something?
Phyrnna (Updated )
Nope! Not much of a life, I know. :P