My house didn't feel like a home without her, but I couldn't replace Sophie with another cat. I didn't want a cat that wasn't her. I thought very briefly about getting a pet rat (company without being too tied down - the best of both worlds perhaps)...until I learned that they leave drops of pee wherever they go (ew!). I decided instead to swing in the opposite direction towards a larger commitment. I'd get a dog. Looking back, I can see that I was a little impulsive about it, but at the time I felt it was the right thing for me to do.
I have a wonderful reason to come home again. :)