Decide if you want a kitten or a full-grown cat.[1] Kittens are adorably tempting, but be honest with yourself about whether you'll be able to match that energy level. Shelters are full of loving adult cats who have a much harder time getting adopted. An adult cat will be calmer and quieter than a kitten, but may also have behavioral issues from its previous life. Adult cats may also have medical conditions you'll have to address sooner than you would with a kitten. Also kittens often scratch very painfully, decide if you want that.