Cats are like people- they tend to be highly individual. Our cat, for example, can't stand cat treats, doesn't like catnip, and actually physically runs away when you try to give him human food (as if he's scared of it- it's so cute). Some days he'll be in to wet food, others he'll leave it alone and only want dry. His favorite toys are not the balls with bells in them, nor the stuffed mice, but a plastic straw (he'll play fetch with us and a plastic straw).
He's also very loving and affectionate. He'll cry when we come home- at first we thought this was because he wanted food, but it was actually because he wanted a hug! Give him food and he'll keep meowing, pick him up and give him a hug and he starts to purr!!
So I recommend just trying a lot of different things until you get to know him/her.
A couple of tips- make sure you buy dry food which is nutritionally balanced. Don't give him wet food too often, even if he loves it, because his litter box will tend to smell more! 1/2 can every other day is fine, but no more than 1/2 can every day. Buy some baking powder and sprinkle it on the litter box- the smell will decrease a lot if you do this! Change the box atleast once a week, or he could get sick. Buy a decent brush- it will help your house safe from excess hair and cats tend to love it. Also, though I've had female cats whom I've loved very much, in my experience male cats tend to be much more social. Some male cats "spray," but you can usually tell by visiting his cage at the shelter two separate times and investigating (especially the smell). Ours doesn't.
Also, consider getting an adult cat from the shelter. You can usually tell how well that particular shelter takes care of their cats (if by smell alone), so if you find a good one, you can be sure that he's had good medical care. Adult cats need homes much more than kittens (kittens are usually taken from shelters very quickly), and they are often more satisfying than kittens. In my experience, it's a little bit harder to form a relationship with an animal if you're constantly under pressure to train or punish it.
Good luck getting to know your kitty!
Here's ours- Weyoun- he's a bobtail and he loves to lay in the weirdest positions!
