Since I've gotten off the gender fence and started expressing myself as completely male, I find I'm much more interested in looking good and taking care of myself physically. I think it's because I finally feel good about how I look, and who I am. I'm enjoying buying and wearing nicer clothes, pay more attention to keeping my hair nicely cut and groomed, and have started working out more to get myself in better shape. It's a piece of healthy self-love, for anyone of either gender, it seems to me.
As someone trying and failing at being female for most of my life, my self-image sucked so much that a lot of the time I just didn't care, and all the female trappings of grooming and beauty (makeup, hairstyling, clothes, etc.) were both lost on me and utterly mysterious to me. I mostly went for a plain-to-the-point-of-invisibility androgynous look in everything, and I've been surprised to find that I feel differently now, and enjoy expressing myself more interestingly through clothing choices and other things.
I can look in the mirror now and like the person I see there, and it makes a world of difference.