I wear perfume entirely for myself, really. I have a very sensitive nose (odd, because I am a fairly heavy smoker, but I'm the one who can always, always smell mildew/mold and the one who can smell it in an instant when the cats peed on something while my wife can't smell it at all, for instance, and I'm always the one wandering around the house going "...what's that smell?" when somebody opened up a bottle of something on the other side of the house) and having something pleasant to smell nearby -- namely, me -- means that if there's something funky and odoriffic nearby, I can just stick my wrist up against my nose and smell something pleasant.

Like you, smelling good also does make me happy, and it's part of a whole wheelhouse of techniques for my mental well-being -- scent is one of the great emotional triggers, really, maybe even the strongest, and I can tweak my mood really well by putting on various perfumes that invoke various moods -- but honestly, I wear perfume to drown out the other smells around me. I find a lot of personal care products to be very over-perfumed in a way that smells really grating to me -- I usually don't wash my hands in public restrooms, for instance, because the soap clings to my skin for the next eight hours and always, always smells awful on me -- and having something nice to cleanse my 'palate' helps me to put up with being in close proximity to somebody wearing a really cloying lotion. Or Axe body spray ;)