Or...could it be that everyone's taste buds are different?
Everyone's tastes are different. If we listened to what is "good" by some people, we would only have about 50 varieties out there rather than about 2000.
"What tastes good" depends in part on natural variation in how we interpret our taste buds and sense of smell, and that in part is affected by body chemistry / blood pH, which is largely the result of diet.
Eat a lot of meat mostly: you have an acidic blood pH.
Eat mostly a veggie diet: you have a much more alkaline blood pH.
The same holds true for the photo-receptors in the eye; the color blind person is an extreme example of this. In astronomy, different people looking at the same double star, one will see the pair as being emerald green and dusty yellow, while another person looking at the same stars with the same optic might interpret them as being pale blue and an antique white.
There are no bad blends, only more or less popular ones enjoyed by the mainstream. I do not think any blender out there creates a new blend that tastes bad to him, but says, hell, let's put our name on it, maybe it will sell anyway! I think blenders are looking to both improve on old favorites and past experiences as well as come out with something new and different no one has thought of before.
I've bought a very few tobaccos that I absolutely did not like at all. In one case, it still tasted bad despite repeated attempts; eventually after aging, I will find something to blend it with. Another, on second try, I was shocked that it was now delicious! If I did not know better, I would not have believed it was the same tobacco.