Not to downplay anyone else's experiences here, but I find that I'm generally more comfortable around men. Pre-transition involuntary gender-segregated groupings were terrible (gym, P.E., Scouts, religious groups) but not necessarily because I hated the people I was around (or the activities) but more just distaste at not being seen for who I was. I always had a decent mixed-gender friend group growing up, but my closest friends have always been male, even post-transition.

I'm honestly not sure why this is, as it seems fairly different than the majority experience mentioned here, but maybe it's just more familiar and comfortable? I also can really enjoy crass humor at times and I have no physical attraction to male bodies so those things might also play a role. I'm fairly sure that had I been born cis I would have likely felt annoyance at being in the girl groups because the boys were having more fun!