Adopt, adopt, adopt!!!
Adopt an adult, by any means. They don't need as much hands-on attention as a kitten does.
Usually it's wise to show the cat to the litter box, especially after it's eaten. If you adopt an adult, it should already be litter-trained, but a kitten is much more work, and not the right choice for a teen who is always off either at school or hanging out with friends.
Also a note on litter - never use litter that's "scented", not only do cats not like the smell, but the fragrance is toxic to their systems due to phenols.
All breeds are neat. A cat is a cat. They're unique regardless of breed, they're unique by nature alone.