I always see talk about gel and injections but has there been much success with patches? I'm on gel at the moment and it's fine but they just seem like a simpler alternative.

I've never personally known anybody to be on patches. I've read two accounts about them from different guys and the consensus was avoid if at all possible. They have the same concerns as gel (sweating, transference), with the added potential side effect of skin irritation. Both guys whose experiences I read got rashes/welts. A third person chimed into the same thread to say that that reaction was common and due to whatever chemical carrier was being used to get the T from the patch to the inside of your body.