Hard to pick...I, too, buy pets. I had 4 dogs, 3 cats, a small aquarium of fish, 5 betas, an aquatic frog, a tarantula, a gerbil, and 13 dwarf hamsters at once. In a two bedroom apartment.

I also bought my car. I really did need a new one. I'd try to justify it with that, but I bought it because of the color and the fact that my iPhone connected to it. Didn't even glance at the warranty or mileage.