Angerwing said:
When my friend came out as being gay, he changed his personality to fit the stereotype. I hate that, I think it's weak-willed and stupid. It really bothers me, because he was a really cool guy before, and we all suspected he was gay anyway. Now that he has come out, he's really annoying to hang out with.
So no, I tend to dislike anyone who changes their personality to fit their particular social niche.
There are one of two things that have happened with your friend.
Most likely, he's at a stage of needing acceptance from the gay community. This happens mostly with teens who come out, but also sometimes people who are a bit older. He thinks that to really "belong" in the gay community he has to fit the stereotype. If this is the case he will eventually grow out of it, realize he doesn't need to do that, and start being himself again.
Otherwise, (and this is also quite common) he was suppressing his personality while he was in the closet to seem more typically straight, as a way to hide his homosexuality further. If this is the case he isn't putting it on now, he was putting it on before, and now he's being himself.
You will have a much better idea of which one this is from your time spent with him
Also, gay femininity and lesbian masculinity are generally not something people put on, usually its very naturally how their personality is. This is why there is evidence to suggest that gay men use more female areas of the brain and lesbians use more of the male areas. The very extreme variants of this I imagine would be transgenderism. Likewise, this doesn't mean all gay people act like the opposite gender, quite the contrary, personality comes largely from nurturing factors too. There are plenty of gay people who you would have no clue were gay unless they told you, but stereotypes exist for a reason, they are just a very bloated and exagerrated example of the average gay person.