The biggest thing was just that I became more aware of male privilege and of the constant micro-aggressions and harassments that women have to deal with.
Pre-transition, I made a mistake and thought that my girlfriend had a ride home with friends after a roller derby bout, when really she was counting on me to take her home. I didn't know this, which led to her walking around the outside of the arena in the middle of the city at night looking for me. She had a drunk creepy guy hitting on her, and she was FREAKING out, crying over the phone as she asked me in a panicked voice where I was. When I finally picked her up, I was an unsympathetic jerk. I didn't understand it, I was all "oh come on, it couldn't have been that bad." And, well, karma bit me in the a**. Now I have guys stalking me every time I walk through a seedy neighborhood, and it freaks me out too. I actually called her and apologized a few months ago, because I just didn't realize how it felt to actually go through it.
Aside from that, not much different. I was never able to understand guys pre-transition, and I still can't. I am indeed more aware of when guys are talking about their stupid drunken escapades and stealing stuff and other bulls*** "look at how dangerous and tough and manly I am" nonsense, but it bothered me back then too, so now it's just a decreased tolerance for it where it just really makes me roll my eyes and mentally think "okay, yeah, you're an insecure guy trying to prove to everyone that you have a big penis, yada yada yada."
Women, I'm much more empathetic toward their feminist causes now, but that's about it. I wanted to be included with them pre-transiton, and now I actually can be included with them. But honestly I still really don't feel initiated into the club yet. Maybe that will change once I start my new job, but not yet. I still don't really feel any more of a connection to my female friends from before transition.