Who to buy?

Now. im kinda wierd. I say i like mobility, but all of the good champions who have mobility, i dont like! I like assassins. I think. I also like tanks, a bit. Aatrox is my favorite to play, early game,: late game, i dont get much kills. Rengar was kinda fun. Akali, loved her. Fiora is also fun. Just name some champions, thanks.