I was an avid fan of Aion for a long while. I was one of the few that picked Spiritmaster class and stuck with it when the game launched (I even participated in the Alpha and Beta for the game). It was the most under powered class when the game launched and everyone that tried it didn't like it much....Once NCSoft resolved the class issues of being under powered, they became one of the most powerful classes when I last played it.
I could solo against 3 other players, keeping them taunted, feared, dishing out DOT and kiting the crap out of them. It was great fun.
Then NCSoft started shifting the game from having to earn things (grinding/group hunting) to fast leveling and basically throwing top end weapons/armors at you to get to end level faster. Then it turned free to play and while you get all the game without paying, you always have that carrot dangling in front of your face with chests/boxes you find, but need a key from the pay store to open and so on. I stopped playing the game after it turned free to play, just wasn't the same.