This is your chance to be that annoying person who hates everything. Has there ever been a super popular game that you've looked at and thought to yourself, "why does everyone like this?"
Because I'm a grumpy old man, this tends to happen to me quite frequently. Dragon Age: Inquisition is probably the most recent example. I spent a dozen hours trying to 'get' Dragon Age: Inquisition. Eventually gave up.
But I'm also aware that some people hate the games I love. So many people don't 'get' Metal Gear Solid for example, or Halo, or Metroid Prime.
What's your 'I DON'T GET WHY EVERYONE LIKES THIS' game?