Hair traps scent. Vagina should smell like vagina, not lilacs, or some other dumb shit. I prefer the visual appeal of a shaved pussy, but hair adds to the sensory experience.
To each their own. For me, I'd much rather see a nice tuft of hair than a bunch of razor stubble and bumps. I personally feel a natural pussy is one of the most beautiful things there is. Of course a little trimming can be good, for some more than others.