When EQ2 and WoW were released i had just given up on OoW raiding on EQLive, so i quit Live and got EQ2. Have to admit i liked it at first, but lvling was easy, which can be nice, except when you get into the high 40s, there was nothing to do, there was little to no end game, my guild was the first Qeynos guild to lvl 30, and focused on that before raiding, so even by the time we got 30, and started raiding, there was very little to raid, alot of people would pick up tradeskills to try to keep from being bored tho that didn't really help. Others like myself just made alts and tried to make the most twinked out chars on the newb island. After playing EQ2 for about 5 months, most everyone i knew including myself quit, and none of us have gone back. Tried things like GW, which wasn't that great then, had fun on WR, and then on SoD when the servers were brought back up, but lacked having RL friends here, so then i tried WoW.
Now WoW was completely different, alot of people complain about how it looks too much like a cartoon, but i just ignored that part. I found that the quests there were alot of fun, usually less of a grind. I enjoyed how the classes you played grew with you, the way abilities you had expanded as you progressed, i played on a new pvp server, so i was able to play the game as the server economy wasn't set already. Lvling is pretty easy, but it was more enjoyable, and not to mention the pvp, the world pvp could be annoying at times, usually involved someone trying to kill you while your uner 50% hp and fighting 1-2+ mobs, but the first time i played a Battleground, Warsong Gulch to be specific (Capture the Flag BG) I was hooked, i had forgotten how much fun it is to play against actual players, they brought some of the old RTS fun into WoW which i haven't seen any other MMORPG do. End game can be pretty bad for some on WoW, PvE players especially, either your in a raid guild, or your doing the basic end game group instances over and over. So most those that weren't interested in PvP or trying BGs the game lost its pizazz and the quit.
I recently quit WoW myself, made the mistake of trying for the pvp rank 14, which required competing agsinst players that were on 24/7 in BGs, which burnt me out fast, so i came back here, i plan to stay here this time, gonna try to get my wife to play, and hopefully some old friends.