[atomiczombie]

I was on T for a year, and 5 months of that was the full dose. My personality did not change. There were stress factors that went along with being on T, but they weren't from the T itself. They were related to things that came up because I was on T. Make sense?

However, that did not make me a cranky guy, just more anxious. I don't think T fundamentally changes your personality. If he had aggressive tendencies before, those might be more noticeable as he lives in a world that expects that more from him.