Cats eat, sleep, play, want attention, and show affection in return.  Sometimes, they can be very helpful.  You might think they're in the way, but they're just trying to get your attention. as shown in the above pictures.  If you have a sense of humor, you might get a chuckle out of the following pictures.

They help each other keep clean,

and while they're exploring.  (Sometimes you need a lift up)

They even help other animals,

but they love to help us!  (In their own way, of course)

No need to worry about your computer if your cat is on the job!

They'll help you with your food,

help you to stay warm,

and warn you about danger.

What more could you expect?  Talk about a complete package deal!  All they require is fresh water and food along with your affection.  Pretty good exchange, I think.