Strong this.
I watch League of Legends professional play fairly regularly.
I'm personally Platinum-ranked in League of Legends myself. This means I'm (barely) in the top 10% of LoL players.
The pros know SO MUCH more than I do, the way they develop and execute strategies, the little tricks they use to get the most out of their champions, it's all on a whole other level from what I know/do. So I watch them to learn from them. For those who play League, I mean things like using flash during Gragas bodyslam or Vi vaultbreaker to instant-hit the spell before your enemy can dodge, stuff like that. Before I watched LCS I didn't know you could flash mid-spell without interrupting the spell. I became a better player because I adapted what I watched into my own repertoire.
I don't honestly care very much who wins, although some teams are known for more innovation than others, so I tend to root for them >_>
We have a 5v5 LoL tournament coming up in my town next month and am looking forward to checking it out. Not gonna play, tho. Haven't even tried to play LoL. Now if it had RPGs and mini-guns, I might give it a shot. ;)