I find Tillamook (sp) the best brand out there, just didn't have any and was obeying copyright laws by taking my own photo.
Provolone for sandwiches, Kraft for grilled cheese though, and cheddar works in any make/model for me.
Hmm... Tillamook, too pricey for a poor student like me, but tasty when I get it! The extra sharp NY Cheddar from Trader Joes is pretty good and cheap.
Provolone for sammies = yum!
For grilled cheese, I still like using cheddar, just grate it up and put it on the bread with some hot and sweet mustard, slab some butter on, and onto the cast iron skillet it goes!!