I've had a manicure, so that I could learn the technique (youtube wasn't doing it for me). Now having learned I can do a professional looking standard polish, french polish or even fancy nail art. And I like having nice nails some of the time. You can't beat watching a professional carefully in real life for that, or hairdressing come to think of it.
I got into manicuring working in a particular office where all of the girls had their nails done and you stood out like a sore thumb without. Bearing in mind, these girls were all on a pretty small wage, but would go and have acrylic nails or gel colours every couple of weeks. I "invested" in a manicure to learn and some polishes, files and so forth and now can do it for years.
As for pedicures, my pedicurist is in residence also. My husband does it, even down to painting my toenails now and then.