I mostly dislike open-world games because of the lazy travel systems. Either you have to run everywhere or you free fast-travel from any point, too any point.

There is no middelground.

I miss games like Morrowind, where you not only had to pay for fast-travel, but it functioned more like an actual transportation system. Like, you had to go to this city and take a Strider to that town and then a boat ride to get to your destination.

Giving the world some infrastructur and natural money drainers helps with immersion and facilitates the need to go do some side-quests every now then. You get fast-travel, but you also get to see the world that was build for you. And you don't run around as the richest douche in the world by level 10 with the best gear available because nothing costs anything.

Bethesda skipped this aspect entirely back in Oblivion and never looked back. Making your characters golden gods from the get-go, with no reason to interact with anyone or do anything except screwing around and collecting trinkets.

There's more to it, ofcause, but this is the biggest pet-peeve I have.