For me it is the Home Shopping Network. He uses his earphones when he watches because I cannot stand listening to the automaton fake energy robotic folks yapping away day after day after day. Not my cuppa tea.
For him it's the scifi spooky things I like to watch on TV. I record them and just watch them when he is out and about. Also he likes stories with happy endings and while I'm not a fan of sad I do enjoy reality and some stories are based on real people whose lives were tragic.
So we honor the dislikes by accommodating to each other. You do too, right?