It's mainly hygiene for me, but it's just neater and easier, especially with things like panty liners.
I'm single so it's not like I have anyone else' opinion, but it's nicer too.
(Haha, I just have to add this little tag on here. I realized I answered a similar question on here once about shaving. I didn't even consider that they were talking about the girl parts and joked that I waited until I was a yeti. *sigh* Good times.)