I like looking (for want of a better word) polished, because looking like it makes me feel and act like it 
. If I don't make the effort I feel slobby and undone all day and what I do feels slobby and undone too. Also, I feel I generate more respect if I am at least halfway presentable than if I am greasy-haired, crumpled and pasty-faced. Now if I were a natural beauty like say, Angelina, then no I probably wouldn't make as much effort. But I know for a fact I look better with better clothes on, hair done, makeup done, than not. Sadly.
Putting on makeup, putting hair in a nice bun and wearing some sort of decent clothes is second nature to me because I've done it so long, so I don't see it as making a particular effort.
I don't own a single pair of jeans (although I do have long-length leggings for tunics on more casual days) or a tracksuit or similar sports wear. Usually I wear a dress/skirt, and tights and say, little ankle boots.
I've also never actually been to the shops without a bit of makeup on at least because I put it on without fail, every morning so it's there no matter what I do in the day.
I don't look done up like an air hostess exactly nor do I have anything approaching "designer" wear, nor do I wear 4" stilettos type boots, but I probably do look like someone who "dresses up" even though I'm just doing what I would do ordinarily anyway.