I would have to pick Maplestory. Iv have never played WoW, so i can't accurately pick, but maplestory offers so much, and being it all free, i can come back to it if i become bored of it. Being grown up cheap, i would probably force myself to play WoW because i payed for it, no matter how boring it got.
I pick WoW. I used to play MapleStory a lot when I was younger, but there is just so much more to do in WoW, meaning you can play it for longer without having to repeat the same god damned group quest over and over again for eight levels.
And monthly fees aren't all that bad. Sure, it's expensive to play, but the monthly fees also encourage the developers to do their best to keep the players they have, by fixing bugs ASAP, providing tech support, and constantly adding new content for those who have already tried the rest.
But then again, it was probably almost five years since I last played MapleStory.
