CS:GO all the way or source best way to improve your aim, game sense, recoil control, factoring in the awful teammates that you can get stuck with, the progression routes are shown for me with over 1000+ hours in both games from the first 300 being a silver elite (lowest rank) to making my way up to Legendary Eagle Master and hopefully one day Global Elite hope this helps
My top is Battlefield 3 as a shooter on PC. It is still the best one. And speaking of competitive shooters, then I'll go with CS:GO. But still, LoL is my most favorite game ever.