I dislike sarcasm in everyday use. It's a form of passive aggression; people use it to dress up really offensive statements as humour and then when somebody gets offended come out with the old "it was only a joke" / "why are you over-reacting" line (thus trying to make themselves out to be the victim; another passive aggressive tactic).

That said, I like sarcasm in satire. For me though, satire is about attacking powerful people and institutions / conventions and sometimes sarcasm is a good tool for that in a way it isn't when dealing with people one to one.

Dry humour is kind of different; dry humour is about making deadpan observations and observing the world in a slightly skewed way. I have a very dry sense of humour but I'm OK with that as it never manifests itself as aggressive or mean.