I can say that, undoubtedly, my favorite Key character is Hinata. I always looked up to him in the anime because, well, I really love that scene in episode 10. It could have been any other guy to take on Yui’s request, but Hinata went in there like a man and even reassured her of all her doubts (really that imaginary broken hospital window scene was just too sweet). Adding in everything that happened after that and how he voluntarily helped Otonashi, well, showed that he was a bro.
But anybody who has read Heaven’s Door can agree with me that he brings bro level to the max. There are many instances, but I think Shiina arc in HD shows it best. Sure he was funny and idiotic at the beginning but man, the lengths he would go is just… Well you have to read it yourself to find out 
Well since he is my favorite character, he would be my favorite male character as well. Female character is something I kind of can’t decide on (and don’t think I ever will).
Per game… I guess I’ll choose both male and female (except kanon and air because there are only like 1 or 2 choices haha)
Kanon: Nayuki
Air: Kano
Clannad: Kappei & Ryou ( 
)
Little Busters: Komari & Kyousuke
Angel Beats: Hinata & Yui
Rewrite: Yoshino and Kotori, with Lucia in a very close second
…and this made me realize how my favorite male and female per series are all potential shipping pairs x.x
