mozzarella (usually in the form of string cheese) or BabyBel
I can, and have, eaten an entire package of string cheese in a day (this also goes for pickles and olives

)

(no, thats not my hand you pervs

)
Edit: I also enjoy cottage cheese on egg noodles (the wide, rectangle ones)

(cheese noodles) Nothing fancy, no butter or anything, just a big-ass scoop of cottage cheese on egg noodles. I wouldn't say its my favorite cheese, mozzarella gets that by far, but its still good eatin :P