League of Legends (LoL) Question: How can i find a champion wich i can play over over and over ?

Depending on what role you wanna main and what champs there are i'd suggest you just mess around untill you find the character you do best with and also enjoy playing during any type of situation, just remember your best champ can always counter the ones who counter you.

Play Gangplank if you want a one glove fits all type champ, he's a pirate and can play pretty much any position in the game (though he ain't the best at any of them, jack of all trades - master of none)