I hate..........hippos.
I use to live right on the Nile, and every once and a while when it flooded, hippos would just....kinda....chill outside my backyard. This caused me to SPAZ out with FEAR.
Also crocodiles. F*** crocodiles.
I like snakes though, I just wouldn't want to be around poisonous ones. That goes with a lot of things though: lions, bears, cheetahs, rhinos, etc. I think they're cool as hell, I just don't want to be caught next to one.