This isn't a gaming thing. It's a human thing.
Not one of you would dare tell me that I was closed-minded, for instance, for liking the colors purple, blue, silver and black and not being particularly jazzed about orange, yellow or brown.
Not one of you would dare tell me that there was something wrong with me liking steak and potatoes, and not being into Thai food.
Not one of you would dare get on my case for being a hockey and soccer fan, and being relatively indifferent about NASCAR and basketball.
Not one of you would dare yell in rage that I just wanted to listen to classical music, folk and classic rock, and that I had zero interest in C&W and less than zero interest in hip-hop.
(Well, some of you might: there are assholes everywhere in the world.)
I am a grown adult, and I'm allowed to have preferences. I am allowed to enjoy tea and dislike coffee. I'm allowed to enjoy SF and have little use for romance novels. I'm allowed to worship at a Unitarian Universalist church and decline to go anywhere near a Pentecostal or Baptist church. I'm allowed to sing in a university chorus focusing on classical music, and decline to sing in a barbershop quartet.
I am not going to seek anyone's approval for, or brook anyone's interference with, these choices.
And in like fashion, I play point-buy; I won't touch random gen. I have a strong preference for GURPS. I'll play fantasy, supers, pulp and low-yield SF; I won't touch horror or espionage. I like plenty of RP; I'm indifferent towards hack-n-slash.