I have 3 cats, 1 dog. I've had 5 cats over the last 4 years. I like both, for different reasons. Cats I like because they are low maintenance. I feed them, scoop their shits, and pet them every now and then. I can leave for a weekend and not worry about them too much. However, they scratch the sh1t out of my furniture and run around making noise at ridiculous hours of the night.
Dogs on the other hand, are interactive and thoughtful. They always want to be near you and lick you; they make you feel needed. But, because they require all that attention, they are a huge commitment, and sometimes burden. I hate the fact I can never be away from the house for more than like 10 hours, unless I take my dog with me, which I can't always do.
Either way, I love all my pets.