You know, I don't actually mind spiders all that much so long as they don't take up residence above my bed or something. I woke up one morning to find an incredibly elaborate web, almost human-sized... between two of our cars in the driveway. I have to respect the spider's dedication, but really it could not have chosen a worse place to make one. Kinda felt bad about that one...
That being said... roaches. They're huge. You step on them and ugh, they're still moving, so you step on them again and now you have a mess to clean up. Ech.