Definitely spiders. Snakes are cute, hard to hate them, even if they are venomous. ._.
SPIDERS, on the other hand.... I've had a couple of bad experiences. I once opened up a letter (I mean like a real life email) and not ONE..... but TWO. TWO DEAD SPIDERS came flying out at me. I screamed and threw the letter as far as I could, which wasn't very far because it's paper.
When I worked at a small shop, it had a very tiny bathroom. Well, one day I did my business, went to go flush, looked in the toilet.... and there was a spider just chilling IN THE BOWL of the toilet, not far from where precious, sensitive areas just were...
I will live with spiders if they stay in their own area. Like the corner of the bathroom or ceiling. Okay, I'm not going to go there, fine. But as soon as they start moving around and coming into my area, that is when our deal is over.