I can't... get into open world games?
I had fun with Skyrim for what it was, but honestly the most interesting bits were inside the towns and cities, in the College of Winterhold or dungeon-diving for quests, and the world actually felt a bit small considering it took what, less than a day of in-game time to run from Markarth to Whiterun on foot? Sure, that's only half of the region, but it still skews the scale somewhat.
But even still, I never finished anything in Skyrim. I played it for about 100 hours across a few different characters then felt bored of it.
I'm surprised I managed to make my way through the campaigns of Assassin's Creed, ACII, and ACIII (didn't make it through BroHood or Revelations), because that franchise pretty much exemplifies all of my problems with sandbox games: There's never enough focus. They always feel like they need to throw millions of other things at the player to do, and it ends up pushing the important missions to the side or impacting the quality of the base gameplay because they're trying to cram in everything else and the kitchen sink.
Sleeping Dogs remains one of the only open-world games that I've played through without ever getting bored, just because the world-building was fantastic and it didn't feel bogged down with pointless side-missions, minigames, and collect-a-thons (even though it did have all three).