Celtic Heroes

What MMORPGs have you played? What are your favorite features that you might like to see more of in other MMORPGs?

MMORPGs I've played in the past:

-RuneScape -> great house system, large player base, duel arena
-Vindictus -> interactive gameplay, wonderfully done bosses
-Perfect World -> massive amount of gameplay, flying, huge map
-Battle of Immortals -> nice graphics, well rounded game
-Star Wars Galaxies -> who can say no to star wars?
-Runes of Magic -> similar to WoW, mounts and etc.
-Shaiya -> plenty of quests, dungeons, your basic MMO
-Dungeons and Dragons -> played when it went FTP, no real interest

The list goes on, I know there's many more that don't come to me off the top of my head. I've also played most (if not all) iPod/iPhone MMORPGs. How about you?

Probably the best I have played was Guildwars.
Others Navyfield, maplestory, runescape, flyforfun and Ferentus Best one next to guildwars. To bad they made the game for koreans only. and then they pulled down the servers or something....

I played an mmo called voyage century online for a while its pretty good
I have also played guild wars(trial but definetely getting the second wen it comes out)
Battle of immortals
Perfect world
And i am currently playing apb reloaded
I am also looking to get secret world when it comes out