In Dragon Age and Mass Effect games I always play as male once just to see the differences (especially romancing the straight female LIs) but all my other playthroughs are female, and it's my female Shepards I'm most attached to. I've played most of the games at least 3 times so the female PCs definitely predominate.

And yeah, playing as a female hero is great. I specifically love being able to play as a bisexual woman, not something many games let you do! I like being able to play as a POC too, though the appearance options could definitely be more varied.