T can affect alot of things, including your mood. In bio males who take it illegally to bulk up or whatnot, IMO, have a higher rate of roid rage as opposed to us who are taking it for hormone replacement. Yeah, it might make you react differently to situations. But in alot of guys, including myself and a good friend of mine, it made us calmer. It all depends on your body. It's a big myth also..I don't think nearly as many of us get 'roid rage' as it's made out to be. That's the first thing I heard from my friends when I said I was starting T..."will you be all angry?". Turns out, I'm calmer. Unless I'm nearing my next shot, then I get irritable and such cause my T levels are down.