Didn't cross my mind that someone would suggest that I'd be trans (just) because I want to play female characters too (and sometimes robots and others).
The thought alone feels so strange to me (to me personally)!
Of course a joke is a joke and OK in my case (when the intention is good) but if someone insisted that I'm a trans based on my game characters only, I would get upset.
I wanna experience what it’s like to have less rights
How many games make beings behave differently around females than males?
I've played lots of different games and I don't recall my lady characters having less rights in any of them.
I think it's easier to find different gender behavior towards your characters in tabletop or text roleplaying games, where the player has much more freedom over their characters, NPC's and the world around them than over videogames people have coded to behave in a certain way and a certain way only.
I was once handed a princess to use as a playable character in my first text-based chat roleplaying game with 3-5 other people of girls and boys.
It quickly grew on me and I started using girls more often as my playing character from then on.
I won't deny that looking at them could be generally nicer, but I believe it's not the main reason. At least when it comes to text roleplaying, I like to (try) think and behave like a lady in games, to roleplay in their world of view. It's neat in its own way and I love the immersion when it hits me!