Well the four I have are only kittens so they may change over time, anyway....

Darwin is the daddy the one who is not afraid to try anything (except sitting on laps yet)

Harry Houdini is the most playful of the lot and loves having his belly rubbed while putting his paws on you, only in a fun way though.

Suzie is the most affectionate, she will meow if I stop stroking her, though if I stroke her for too long she gets board and sometimes wonders off.

Izzy is the most shy and scared of the bunch, she will play fight with the others, but often she will run off if you try and stroke her (though she is getting better)