It was also rock hard (you lost xp for dying and could even go down a level) and it was also stat heavy and nigh on impossible to succeed very far without a group. The toughness could be inconvenient but lead to what must be the friendliest and most helpful online community I've ever seen in an MMORPG. You'd always get higher levels running past and buffing you or healing you if you struggled and it didn't benefit them in any way, it was just how the community was. Of course one good turn deserves another so when I got to higher levels I would do the same.
I also played a long running beta known as Mercenaries of Astonia (V2) which, at the time was like crack. I'd get up at 6am on school days to play it for an hour and all my mates played. It's no longer in the running.
Guild Wars 2 is the latest one I own, played it for a bit but haven't really gone back to it for a while. It's good but I'm starting to see that mmorpg's are a timesink that don't really feel very accomplished compared to offline games (of which I have many to complete.)