Surprising may be a bit subjective. I know that I am all too often surprised by my opponent - and not in a good way. This may be a good way to study what kind of patterns have interesting weaknesses.
Surprising is very subjective. I was playing chess in a cabin full of people and found the checkers game next to me to be more entertaining - most likely because of the people. My chess moves were not quite random, but because I wasn't really paying attention they were really frustrating my opponent because he couldn't make sense of what I was doing. My moves were either not very logical or so brilliant that he didn't know what I was up to and it was really getting into his head. Surprising moves? Yes. Good moves? Not so much.