I think... spiders are cute >///<. And snakes are cool! I can't say I fear either one, although of course I wouldn't recklessly let myself get bitten by a poisonous one XD
Scorpions, on the other hand, are a little trigger-happy with those tails of theirs. Usually I just pick up spiders to move them outside and I've never been bitten, but go anywhere close to a scorpion and they just keep attacking.
Mosquitoes also suck (no pun intended lol). If I see one inside I'll drop everything and hunt it down before it bites me. Usually it bites me anyway and that's how I find it.
The most painful bug I've ever encountered was a saddleback caterpillar. It looks like this:

I accidentally grabbed one while pulling up corn stalks once. Ouchies. Was paranoid about touching anything outside for a while after that.
I don't actually dislike any of them though. Poor things just wanna live. It's not their fault nature made them into such abominations XD