I don't think 'don't get' is the same thing as 'don't like'. It's about not understanding why others do like something/someone rather than outright disliking it yourself. You may have no strong feelings one way or the other for something but still not get it.
For me, the OP asks not for a list of things you don't like but for things you don't understand (get) why other people do like.
For me, the OP asks not for a list of things you don't like but for things you don't understand (get) why other people do like.