I am satisfied with losses that FEEL fair. The problem is that is just a feeling.
Generally longer games. I understand the feeling of giving up, but at least if you try to get to six-items the early feed won't matter. I have only had one long game where I felt it was completely hopeless, but even then I wasn't upset. It was a 50+minute game and we had all inhib turrets gone. We would keep getting picks but could never capitalize with a push, so it felt pointless. But I was happy that we pushed a negative game out so far.
Sorry to everyone who wants to forfeit at 20:01.
Increased chance to fight back. Sometimes in shorter games, it feels like you can't walk out of base because you can't establish vision when so far behind. Or even if you stay under turret they will successfully dive without punishment; I don't care if I die but at least make it almost a 1for1. I know a good dive is an art but late game it is just a dive. There is no way to defend your inhib turrets when behind sometimes and it is disappointing.
Don't have all 4 lanes lose early game. This is the worst feeling. I know it can happen for a variety of reasons, but if it does it makes me feel like Riot is not even trying to balance games.