One of my games, I was able to get a player to GM while I took a break. So I'm running only one regular game, which isn't so bad.
I do find that I get bored with just one character, waiting for my turn to come around, not really having the ability to shape the world or tell the story (at least not at the level a GM does), etc.
I've run it in the past for another group.
I don't know if it would be enough of a palate cleanse from 4e, honestly. It still has this exception-based and power-based design, where every attack requires a player to write down 2+ sentences describing how they can use it.
Maybe in a year or so, I'll be ready for it.