Getting suspended was the best thing to happen to me in League.
Seriously, getting mad in this game is a trap. You flame people they flame you, and the game just becomes increasingly misrable. Losses turn from something unfortunate to an emotional tragedy depending on how far it's taken. I could even feel terrible about games I unexpectably won. if I don't get involved in the negativity, if I just focus on the game it's quite liberating, and I play better.
More importantly taking two weeks off made me realize I was too addicted to this game... In my free time I played single player games I had been neglecting, I drew more, I chatted with my friends a bit more, I caught a few more movies and shows. Playing this game too much screwed with the balance in my life. Why make playing League a second job unless you're making money? It's just laziness, replacing the efforts of doing several things with mostly one thing, which has rarely been a good practice.
Still playing League, for fun... but i'll be cautious to never go back to the angry addicted player I was. Not so much for fear of a ban, but because it's far better this way.