Everybody loves their cheeses, but I have to say the local Ontario Cheddars are amongst the best in the world.
That being said, a wheel of Oka from, where else but the Trappist Oka, in Quebec is good for snacking, and to use as a substitute for Raclette fondues. (
http://en.wikipedia.org/wiki/Oka_cheese )
I myself love the mild cheeses such as brie & havarti but also love the blues. I believe that if a burger doesn't have sharp cheddar or a slice of Stilton on it, it is not complete. But my al time favourite blue is Cheshire Blue. Hard to find, but well worth the search. (
http://en.wikipedia.org/wiki/Cheshire_cheese ) The blue variety adds the famous veins.
Vive le frommage!
EDIT:
PS, if you are ever in a bind for a quick snack, a small lunch on the run, take an english muffin, put a dab of mayo, and a slice of sharp cheddar (add some pepper to taste) and put together like a sandwich. Put in microwave for about 20 secs to melt the cheese. Presto, 60 second cheese melt, that will keep you going for a while.