I have much less tolerance for bitter flavors than most people, but more tolerance than the people who really hate it. I consider myself a sub-supertaster.

My tolerance for bitter flavors has increased to the point where I can enjoy the occasional olive, but I don't seek them out. I don't like grapefruit. I've given up on coffee because I have to doctor it with a lot of milk and sugar to make it palatable, and then I get an upset stomach, though there might be something else going on, since I love coffee ice cream.

Anyway, alcohol. I have a low tolerance for the taste, though some drinks are interesting enough that I'll sip small quantities. One time when I was stressed, I drank a whole glass of white wine as though it was water. That was a seriously weird experience, and I don't expect it to happen again.