Personally I prefer WoW's quest and exp system very, very much over FFXI's. While some of the quests and such in FFXI were interesting and kind of fun, they had menial rewards. Not that I'm expecting rewards, but doing the quests that take actual effort don't seem to matter in FFXI, because in the end you still need to haul a million kinds of one thing and trade over and over again to get fame. FFXI's quest system was unrealistic, imo. You get known for handing some guy cabbage 547894357 times, as opposed to being known for helping people out and doing actual things. Bleh.
I also really, really like how WoW doles out exp. In FFXI, questing went unnoticed because the only way to further your character, beyond killing things for quest items (which people rarely do and complain about anyway), was by level grinding. FFXI's quests differ from WoW's too, in many ways. In FFXI, we had to either get some item from the AH, or from a mob, and give it to someone. WoW's quests, from what I have seen, are basically a means to get you to explore the areas and get to know your surroundings. And you get exp for it. It's actually alot of fun, to me anyway. It encourages you to quest.
Which brings me to my next point; FFXI and WoW are both MMORPGs. Note the RPG in that. Role playing game. I didnt feel like I was roleplaying when I played FFXI, because I just did the same thing over and over. In WoW you explore, you act as your character doing things, and that's fun. It also seems like WoW's questing and such takes actual stragety, whereas FFXI seems to take merely loads of patience.
Keep in mind, that these are all matters of preference. I know there are tons of people that prefer FFXI's way of doing things, and I think that's great. If you don't like how WoW works, don't play it. Play for a bit, and when you get a considerable distance, if you don't want to play, don't play. It's all a matter of preference. Some people like questing and exploring to go farther in the game, and some like level grinding. Neither is wrong. They are just two different preferences, for two different games.
I doubt at level 10 you have seen enough of the game to make a completely informed judgement, but then again perhaps you have. What you do is up to you, just find something you like. See what you think of WoW after playing a bit more, or if you know you dislike it now, then quit. It might not just be for you.
If you don't like WoW but still want to quit FFXI, you should try out EQ2 when you can. From what I hear it's alot closer to FFXI than WoW is, without as many of FFXI's downfalls. If anyone could give a comparison of WoW, FFXI and EQ2 that would be great.
Sorry for talking alot, I'm bored. o_O