So it's not things that "I'm not into." I'm not into halflings, gnomes, half-orcs, loxodon, playing with Barbies, tortles, 3e-5e tieflings, aarakocra, githzerai, hammering nails through my feet, lizard folk, kenku, and other odd races. I don't give a fig if my players want to play one of those races, play with Barbies, or hammer nails through their feet.
I'm talking about something the DM or player dislikes to the point where it has a negative impact on fun, however minor. At that point the decent thing to do is just play one of the gazillion other fun things in the game. You're just not going to convince me that the intentional infliction of negativity on another person is an okay thing to do.
P.S. I would actually care if one of my players tried to hammer nails through his feet and try to stop him.