Cats. I've loved them ever since I was a little kid, to this day my cats always head-butt me and want me to pet them when I come home, they enjoy my company and I enjoy theirs. I have a dog as well (because my mother wanted one) but I don't really see myself getting a dog when I'm older? Dogs are honestly just too much for me to handle, no thank you. When they start to bark especially it gives me just immediate stress, I don't know why.
Both! Had many cats and dogs growing up. As well as rabbits, hamsters, mice, birds and fish. Love all animals in general. But not so much into reptiles or amphibians as pets.. xD
P.s. Voted dogs because that's what I currently have at home.