There is a common "problem" for certain people, where the first few MMO he played, will be the longest MMO he ever stayed with. And it's really hard to move away from it.

5 years, I will say, why don't take a break.
No I don't mean stop playing; but just play things for fun.

Pickup any games, have fun with it for a short time, if felt too repetitive at times, or the online community not suitable for yourself, then move on to others. Just play games casually.

Trying to find a perfect replacement for a game that you stick on for so many years, is, almost impossible. I tried, and fail.