The problem with boxing, the only real problem, is that the posibilities are endless, you can box any number of accounts and any number of class combinations. As apposed to playing a single character, your options are pretty limited which is why blizzard introduced achivements, at first i really hated the idea of a xbox gamer score thing in the game, but its actually a really great way to keep you motivated and trying new things, and there is a sence of satisfaction in getting them, the holiday meta ones even more so.

So if your saying you've tried it all, if you mean all you can physically manage or everything you wish to try, i would say your getting bored of the game, and i would recomend putting it down for a month or two, i do this all the time when i get fed up and want a change, the game will be here when you want to dive right back in with more drive.