Long Games or Shorter Games

There's a lot of different opinions on whether people prefer to have longer 30-50 minute something games or the shortened 20-minute-decided-in-15 minute games. I honestly prefer longer games, if I wanted shorter games I'd go on ARAM or something. The current short games just don't feel as fun and while there are the moments where it's longer and a lot of fun, it's not as often. It feels too snowbally. I'm not going to go into all the issues, but I wanted to ask the question:

Long games or short games?