While it's pretty hard to pin down one favorite, I've been feeling pretty fond of Shinsekai Yori recently.
You're so much better off being in your position. I have watched the first few episodes of so many awful shows and finished so many mediocre ones.
Fitness: I have a single weight that I sometimes carry around when bored.
Diet: No Gluten/Casein. I eat almost exclusively rice, general fruits/vegetables, and meat.
Metabolism/Weight: I have to eat a lot to not lose weight.