The little hunting spiders don't bother me so much. Especially the tiny jumping spiders I found in Arkansas; they were actually really neat and friendly.
But the webspinners? Especially the ones with the bulbous widow-shaped body? No. I have a great respect, and aversion, to those little monsters.
But then, that's probably a rational response to waking up & finding one crawling out of my mouth when I was a child.