Legit, almost every game these days are barely over 20 minutes and it's not common to see a game end before then...
And then, there is the oddball 45 - 1h game of League which is a forever lasting agony; the war of hyper carries.
It gets really hard to maintain my proper schedule and fit in a game of League because game times are so inconsistent, one game could last between 15-60 minutes and for me, that's too wide of a range... I hope that games can find the perfect length, between 15 minute stomps and 50 minute torture sessions.
I feel like 25-40 minutes would be a good range for the length of a game, and I hope Riot works to improve game length, it would make the game much better.