I just feel the need to let this thread get way out of hand.
Desert: I don't know if you realized the magnitude of question that you asked. Basically, you asked a question that would get similar answers to "Who makes the best automobile?"
We all swear by our favorites, someone reminisces about the Corvair he had before I was born and how noone makes 'em that way anymore, and Kyle test drives all the models he can and tells us how the drive went and that he ran over a squirrel with the new Camry.
To sum up my feelings on tobacco, I don't believe in BAD tobacco. It is all smoke-able by someone. BAD tobacco doesn't make it through quality control. Something I have noticed, however, is that MOST of the gentlemen on here prefer English blends, Virginias, and Burleys of all shapes and sizes over the strongly cased aromatics, but if I may quote a source that I don't remember: "Do you remember your first cup of coffee? Chances are, it wasn't black." Cream and Sugar do to coffee what flavors do to many pipe tobaccos: they make the tobacco flavor easy to handle, but they mask what many of us here are chasing.
If you want a list of brands, I like tobaccoreviews.com as with the other gentlemen here. It is a great resource.
My real advice is to not take too much advice from others on the internet. Pipe smoking is about self-exploration (mind out of the gutter, Mr. Kaplan) and introspection. Find out what you think you like, then try some similar, but try some completely different, too. Find a local pipe club or shop if possible and swap a few bowlfuls of this and that (many on here will do this too!!) and don't be afraid to say to yourself "I don't like this because of _______" And take that tin, put it in a jar, and forget about it for a year or so. Then try it again. Have your tastes changed? Has the tobacco? Did you "accidentally" end up with a hundred pounds of tobacco in jars that is now crowding out a corner of your basement?
Patience is a big part of this game, and worst case scenario, you blew a few bucks on a tin you don't like, and you can send it to someone on here who wants to try something different.