I'm a pescatarian and am VERY partial to sushi -- made with brown rice, all the better! Are you a fan?
I love sushi, though I'm not sure if I could be a pescatarian. 
Totally understand. While sushi was originally an important source of protein for its Japanese consumers, Americans most definitely like a larger variety of protein!
As much as I love red meat, I think I could go a while on just sushi and fish. Just not the rest of my life.
Ah, it's definitely day by day ;-) And I'm a big believer in listening to your body. Currently, my body craves sushi with pickled ginger, wasabi, and soy sauce!