I didnt know if you and you pokemon had the same gender it will make him happier. =/
As for me nah, both are the same, it doesnt realy make a diffrence, unless you get uncomfortable playing with the oposite gender.
I played this game many times, I think I played 3 times as a male and 2 times as female, now last time I'm playing as a Female.
It's actually the other way around, female pokemon like male trainers, male pokemon like female trainers.
Find the chain.