I played Anarchy Online back when it wasn't free. Fun game. They charge for the use of any of their upgrades (added classes, content/storyline), but the game is very playable without it.
I played Conquer Online for a little while and decided I was too spoiled by the other games that have better graphics. If I'd found it before I'd tried Everquest back in the day, I'd probably have liked it a lot.