my favourite is AOM:T , but the one i think is best is Starcraft

 new games cant even compare, they get boring so fast, like Coh, or the Medieval games, even c&c3 got boring real fast

cs takes time to become good at.

actually its one of the most competetive games out there , and the whole world is filled with really good players.

my advice, is find a mouse and a mouse sensitivity that you like, after that just learn how to fight with the different weapons, and learn the movement.