Granado Espada - Unique in a sense that the setting is during the European Renaissance era and you control 3 characters w/ at the same time with a large cast of NPCs to build your team from.. Each characters have some interesting background story. It has the most AMAZING OST in any games I have ever played. Surprisingly, the game is still having content update after 12 years but game can be considered somewhat dead in NA/EU server. Again, the soundtrack is AMAZING!
Fairyland - I love the fairy tale story telling. A lot of emphasis on capturing monsters and what not. Wonderland uses the same engine but game almost dead I think.
TS Online - Based on Romance of the Three Kingdoms. Super grindy but I like the setting and theme.
Gunbound - Not an mmorpg, but an old school classic. It was THE GAME
Luminary/Goonzu - 100% Player-driven market
Lunia Online - Not much to say. Instanced based game with but nostalgic to me.
Guild Wars - Story was pretty good. The amount of customization you can make for your team is astounding. 10 different profession, lots of skills, and so many ways to build a character. And you can customize up to 3 other heroes so that also adds to build versatility. I love this game so much. 2,000+ hours invested.
SkilkRoad Online - I didn't really get into it that much. It was grindy but very popular back in its days. Now it's bot bots bots
Team Fortress Classic - Honorable mention. Not mmorpg but it's a mod of counter-strike. Invested over at least 3,000 hours.