1. you can train them for the Guide Dog Foundation, service dogs, or guard dogs 2. they can save your life 3. they are loving animals who want to keep their owners happy 4. they play and interact with you 5. there are many breeds to choose from that fits your schedule and life style 6. they dont go to the bathroom in a litter box (although some people litter box train dogs such as the greyhound i think) 7. this is MY opinion, i feel dogs have more of a purpose. I feel dogs are the best pet to get, because i feel cats dont interact as much as dogs. and research also says that people who have dogs get MORE excercise than those who dont.
I love all animals! But I have to say dogs! They're more fun even when they get old... Sometimes! But cats when they get old are just boring. All they do Is eat and sleep. So I prefer dogs over cats! :)