I hate LaTale, it's so overrated in my opinion. I also think Lunia and Elsword are overrated, those two are also extremely boring in my opinion.
League of Legends, Dragon Saga, MapleStory come off as underrated to me. Most of ggftw probably played MapleStory way back when it was ShitStory (aka hackers abound) and actually haven't tried it since Nexon stepped up their game.
League of Legends too hard for most people, and it's not for people who can't handle losing either.
Dragon Saga, idk, it's a little repetitive, but when I pick it up every now-and-then, I have a blast playing it.