I was always very attracted to the style of the game, the 2d and flashy worked for me: I've tried tons of 2d games, none are anything like Trickster. The game just worked for me, and I'm sad to see it go...
However, I recently tried Ragnarok (it's quite old, took a bit to figure some stuff up), but the style is similar.
I doubt there's any underground, I've tried lots.
Also Mabinogi, but I've always played that. Really just jump on and develop my character's production skills daily.
I want a game I can really get into again, and I really don't mind spending money on games I really enjoy and plan to play long-term.
I actually played Spirit Tails, had a healer and got it to the level cap back when it was 40. As soon as I got to max level, I stopped. Tried to return but couldn't.
Was going to check out Ragnarok II, but it's 3d and very point-and-click seeming... doesn't seem like something that will really work for me.
I do really want to find a new game to jump onto, but I can't find one that works.