CheesyFeet, its been suggested that the reason many people dislike snakes, spiders etc. is an inbuilt mechanism from humanities less advanced days. Ie. when we slept in the wild and were more likely to be sharing our bed space with a snake than finding a home for them. That said, i have no idea about it myself, can't remember where i read it. Personally i love snakes, my brothers mexican king died about a year back. Just to make the point its not necessarily ignorance why they are so commonly hated/feared.
Umm... I like neon tetras the least, i just find them so common its boring.