I practically don't play multiplayer/MMOs.
In single player games I'm 90% male, unless it's RPG or such with multiple characters.
If I'm making(/choosing) more than one character, typically one out of 2-4 is female, two out of 5-6.

^ this is me, as well.

If your role playing, typically you want your character to be a reflection of yourself (to some degree).

Eh, you can roleplay with characters that don't reflect you. You can separate them from yourself and build their story as it goes along including choose there gender to start with. It's sometimes more fun that simply doing the same thing over again with your own character. Plus games like The Witcher 3 and Divinity OS2 have set characters and you have to roleplay as them and what choices they'd make more over the choices you'd make. Like I always make gerlalt squeeze people for coins when taking jobs or make the red prince just be a royal dick head. I find this role-playing far more enjoyable than inserting yourself into the world. 

In actual Pen&Paper RPG groups I usually play characters that are nothing like me. That is the whole point. Why would I choose to play an overweight middle-aged man with no cardio?

It is even in the name: role playing, meaning I play a role, not myself.

In video games it is similar, I want to experience things from a different perspective.

I've never really identified with the character I play as. If I spend a lot of time in the Character creation it is not to make it look like me. Usually I just make it the funniest looking possible or the most pleasing to look at.

Even the best games are somewhat flawed but I'll go with MGS5, it's flawed near the end of the game, the story is flawed as a metal Gear game and both feel like the devs ran out of time and money and polished what they had to the poin tthat you have to repeat missions on a harder difficulty to reach the end of the games story but it doesn't matter. I played 250 hours for the platinum and I was still having fun. Gameplay wise it is just perfect. And despite the glaring flaws I'd still give it a 10/10 cause what you don't have is so easily over lockable to what you do have, the greatest stealth action game ever made.

I play as an idealized version of myself, so I will always be male. I like to project myself into the game world when possible.
I wonder how people feel about romance mechanics playing as the opposite gender. I would feel weird trying to woo men and be interested in them.

When I play as a woman, I still try to romance other women, as wooing men doesn't appeal to me as a straight man.

In Mass Effect for instance I played as Femshep, and romanced Liara and Kelly. 

My imagination just doesn't work for "real" role playing, neither in video games or what little experience I have of P&P.

I nearly always do best possible self insert. Only exception is if I treat it as strategy game (when 4+ characters).

Hardly played anything with much romance, but I think I'll usually keep it between men and women, even if I was playing the woman.