I never hear them saying "genre XYZ sucks" or "I hate this style." It's really rare. I listen to and read a lot of interviews & biographies of guitar players - and musicians in general - and outside of specific personality conflicts with past band members I never here pro players dogging on other styles and players. One of the reasons they're pros is they have open ears. There was a great quote from Santana I read last year that said something like "If you say you hate a genre, you'd better be able to play the s**t out of it. How can you say you hate something you don't know a lot about?" x100.
When I was younger, if it didn't have pointy headstocks and Marshall stacks, it sucks. As I've gotten older, my ears have grown a lot. Even though I don't listen to much pop music, it generally doesn't connect with me, I can appreciate a tightly-written song with a catchy melody. I don't listen to a lot of flamenco, but geez, it's powerful stuff played with passion and incredible technique. Not everyone has to like everything, obviously, and not all music is going to connect with everyone. That doesn't mean there isn't something to learn from or apprecaite about it.
Keep your ears open, folks, it's a big world of music out there.