I was once a proud twig, always gaming away, living at my mom's, unemployed, till an overweight foreigner who I used to tease about his weight made me work out with him. I became more confident, energetic, got a job. I met a girl, who told me I should learn to socialize more, she was very blunt about it, very bad things were said. I told her I was happy how I was, she wouldn't take it, helps me fix myself, I end up skyrocketing my career. We're going to get married.
I'm happier than I could ever have imagined thanks to people taking the effort of not letting me proudly be what I thought was fine, cause it most certainly wasn't.
Just saying.
I was about to point out that grey area between "being a dick" and keeping things silent, but I think this is a wonderful example of it -- "encouragement", which is definitely applicable when it comes to social and health issues. Happy to hear about the marriage, g'luck mate!
I'm not sure this grey area exists in other situations, though -- the situation being homosexuality, transsexuality, etc., since there's nothing to "encourage". People can't change aspects like sexuality, and whether or not you agree with what they are, you should allow them to be proud of who they are, since they can't change it and being a dick hurts everyone.
So I'm not sure that states of being, such as Obesity and Homosexuality, can really be grouped together as easily as some think.
I think that this "Obesity" discussion is getting really off-topic, though -- perhaps I should tie this back to women with large breasts in vidya (the whole feminism discussion isn't off-topic, I just don't really have anything to directly address it right now, so I'm skipping over it a bit.)
I think the idea of having a character that works as either male or female is a wonderful way to describe a good character in many settings. Obviously, there will be key aspects of gender that have an impact on a story, such as the ability to become pregnant. As another exception, girls that strive "just to be"
DO exist in the real world, and the implementation a few 2 dimensional characters here and there does make things more interesting. i.e., having 10 female characters that are all waist-size 0 with Double-Ds that have a constant urge to bed a (male) protagonist is boring, stupid, cliched, and trivializes women as a whole. However, having 8 or 9 females that act like normal people and having 1 or 2 boring "strive to be" female characters would be interesting.
I also don't think it's bad to mix a little bit of sexualization into a 3-dimensional female character. By a "little bit", I mean "recognizing she's female and may be feminine", without forcing her to be the exact opposite of the "ideal women" in modern vidya. A good character example:

Ritz wears pink clothing, a cliche of effeminacy. She has somewhat-apparent cleavage, with bronze cups around her breasts, but they're rather small and they definitely don't jump out at you at a first glance. She's also wearing something that's between a skirt and actual armor, which is also somewhat "feminine". On the other hand, she fights as a warrior, and during the entirety of the game she's in, she's not objectified as a sexual target whatsoever -- she's treated like the warrior she is. You could easily make her a young boy instead of a young girl, and she'd be just as effective. It's an interesting combination, and I think it was actually pretty great. I'd love to see less women characters who are polarized to be either "extremely attractive and only strive to be beautiful" or "extremely defiant of society's expectations, dresses just like a man 100% of the time, hates anything effeminate"; I'd love to see more characters that are more naturally between the two, with an additional sprinkling of interesting characterization on top.