Morrowind promised and delivered complete freedom to roam where I wanted and I found it in the big box of videogames at Superstore... That was after trying it for 15 minutes, thinking the animations were jank as hell even back then, and then not touching it again until a month later when I thankfully gave it another chance because I was bored
I played that game entirely to young and somehow finished the main quest line, eventually.
But man, I spent so many hours just murder hobo-ing it because I didn't really understand the quest based game loop yet. I'd just pick a direction and look for something cool. When I found someone that looked like they'd have cool stuff I'd just kill them and take their stuff. The only time I'd reload is when I got the prophecy warning; I broke like every quest except the main one.
This was compounded by the fact that 1) I was really enjoying just exploring and 2) that game was not particularly hard to destroy the balance on. Even a kid with poor mechanical skills could get wildly OP pretty easily.
Morrowind was the first game I started "Do a quick save so that I can go on a murder spree, and then reload when I'm done" xD Also learning how to insult people wearing glass armour enough so they'd attack me first, and now it wasnt illegal for me to kill them and loot the glass armour off of them