Looking for a new MMORPG?

I've gone through Runescape, Maplestory, Mabinogi, Vindictus, Spiral Knights, and Guild Wars. I was able to get into them, but it didn't last long. I'm not looking for a particular genre exactly, I'm just looking for something new and interesting. I'm willing to try anything that doesn't require a monthly fee. I don't mind actually having to purchase the game itself, I just can't afford to be spending money every month for it. Any recommendations? Thanks in advance.