I've always been a cat person, my only pet growing up, except for a few fish that didn't live very long, was my RB cat Katy, who lived to be 18--I was 23 when she died so she was more like a sister than a pet!
As soon as I lived on my own in an apartment that allowed pets, I got Oliver. I do like dogs as well, but have just never had the space or time to have one. We have a house now with enough room, but we just don't have the time to walk a dog, we both work too much.
My husband never had any pets growing up, his sister is allergic to basically everything, and he had never spent that much time around cats, so he wasn't really thrilled per se, when we got Oliver, but it only took about a day to make him a cat person! Kittens tend to have that affect on people