I couldn't care less what anyone thinks I look like, let alone random people in the supermarket.
If I'm honest, I wish strangers WOULDNT strike up conversation with me!
I do have some beauty routines, but it's all done for me and I don't really care if anyone else noticed or not.
I wear tinted moisturiser, eyeliner, mascara for work. If I was going on a night out I might add eyeshadow and bronzer/highlighter but that's it. Rest of the time I don't wear any makeup and most often will happily leave the house without it.
I get my nails done because I like having nice nails/colours and paying someone else means I have a wider variety of choice and is easier than faffing on myself. But I couldn't give a fig anyone else noticed them or not.
Ditto my face. I have a monthly facial, but mainly that's due to a sport I do that means the skin on my face takes a lot of stick from the elements and can sometimes be sore and look "weathered". Having the regular facial keeps my skin feeling brighter, tighter and not as sore. Again, that's for me though, don't care if anyone else noticed.
Clothes - happily walk around in my tracky pants and lycra/gym wear. Only time I get more "dressed up" is in the same scenarios I wear makeup (work or a night out).