I love writing in third person, as it gives you a wider opportunity in adding scenes and etc that does not include the main character.
Honestly, first person turns me off a bit, as usually there would be less description and more action, and the word(maybe letter?) "I" can get very, very repetitive and degrading to read. =/
First person does have its advantages though, as it allows you to build up your character's personality far better than third person. Though, as for the other characters, it'll be harder to do that, as their personality must circulate only through the perspective of your main character.
Gender: