Why I would rather have longer games

To me, long games feel like some epic quest.

Comebacks, throws, both happen many times from both sides.

I venture forth with my allies in tow, to either claim victory from the jaws of defeat, or go down fighting, laughing about an excellent play made by the enemy even as my nexus explodes.

Short games either feel like getting your teeth kicked in or "Really, that's it?". Winning leaves you unsatisfied, needing to play another, which will inevitably lead you to defeat, which in the fast paced meta of today just leaves you salty and pissed.