Exactly. I just said this to another comment where he said you either have a sense of humour or you don't - but I don't think it's that simple.
I have a dry sense of humour. I love Romesh Ranganathan, but cannot stand Katherine Tate. You may know neither, as both are British comedians, but I do think humour is subjective sometimes.
Of course, there may also be people who laugh at everything, and that's wonderful, but not all comedy works for me... I would still, however, argue that I have a sense of humour! :)