As a guy, I didn't give a crap what I look like, and I'd go like 1-2 weeks without shaving, 3-5 days without showering or brushing my hair. Mostly wear the same clothes day in and day out, and hated having my picture taken.
A therapist told me a big marker to know if you're trans or not, is how much you don't take care of yourself in your assigned gender. The logic behind it being that you don't identify with your image in the mirror, so why would you bother taking care of it.
After making the decision to transition now, it was almost like a switch went off.
I now shower everyday. Exfolitate, shave, moisurize, teeth whiten. The whole nine yards.
Not because I care how I look, or how others see me ( I barely leave the house, and work from home), but because I'm moving towards the person I am, and thats a great motivator for self-care.
Shaving/Nairing my body, is something I look forward to doing. Such an amazing feeling.
But as for makeup and getting ready, yeah I could take that or leave it.
But society isn't too kind, and its actually a necessity for safety in some ways for alot of trans women. Even if they don't like it, they almost "have to" do it. Which is kinda sad.
Good TED talk on the topic