My favorite cheeses include:

Bleu Cheese
Havarti (sometimes called butter cheese)
Goat Cheese
Super Sharp Cheddar
American Swiss (more below)

Basically, almost any kind of cheese. I don't remember the name of the brand, but the deli I use to work at (during college) had a "healthy" brand of cheese. That stuff was vile. Other than that, I don't look for specific brands.

I only saw American Swiss at the deli I worked at, and haven't found it out in AZ yet. Basically, it was White American mixed with Swiss. It was a white cheese without the holes and the mingling of flavors was heavenly.