I just tried some Barber's 1833 English Vintage Cheddar. Meh! Not my favorite. Judging from its crumbly-ness, I'm going to guess it is a little leaner than some other cheddars. Not terrible, but not spectacular. Kind of has a mild, astringent quality to it.
The Black Diamond is indeed my favorite, but as you said expensive and hard to find. Sam's Club sells huge block for around $10 - 12, but in a pinch I always get Cabot Extra Sharp.
I cannot buy a yellow cheese, having been raised in Australia, we were always taught that the whiter the cheese, the less fat content and although I know now that this is a coloring put in the cheese, I cannot stand to eat it plus it doesn't have much flavor and Aussie cheeses are usually all good. The Kerrygold brand is good and they also have a good butter, which is also the second dairy product that there is a huge difference between countries (and the milk is different too).
My favorite cracker treat is rice crackers: the brand I have at the moment is Sesmark Savory Rice Thins, I add a slice of salami, a slice of cheese and then a slice of a bread and butter cucumber, love those items together.
I cannot live without cheese. This is a fact.