Dogs and cats definitely have distinctive personalities. Dogs are a big more personable and always want your attention. Cats however, seem to be fine by themselves and really only want your attention when it's inconvenient. They are also, kind of assholes. I love my cat but come on, she is definitely not as nice as my dog.
These guys did a video of what it would be like having friends that acted like dogs and cats. I think it's pretty spot on. Let me know what you think!