Pluses:
Nap time is whenever you want.
Food, water, shelter, and toys are free of charge.
People will pet you and cuddle you.
You are not required to get a job.
People don’t make you learn silly tricks…unless they are really bored or have a psychology experiment they need to do for a class.
Pitfalls:
Taking a bath requires lots of time licking yourself.
Hairballs
People will pet and cuddle you.
No opposable thumbs
No appreciation for swimming.