Mentally, the most prominent changes I've noticed, are I'm no longer as "open" with my feelings as I once was prior to T. Don't get me wrong, I still have a huge heart, I guess it's just harder to express things now. Which is different to me, because before T, I was pretty much an open book with my feelings.
And my anger, is definitely more short fused, than before. I had a pretty hard battle with anger issues in my early teenage years. I would bottle everything inside, and burst sporadically, usually resulting in numerous holes all over my bedroom. I'm not punching holes in walls these days, but I don't bottle things up anymore. My anger usually comes out, on the spot, to whatever the case may be.