>>7384751Well a big part about getting engrossed in media is also your emotional attachment to the product in addition to how much "fun" you had playing it. Its why nostalgia is so prevalent in people and why older games in a series (like Zelda) are so often picked as favorites despite the newer ones being technically better made and more polished.
Would GTA be Miko's favorite game if all things were equal? Who knows, but, she obviously has a huge emotional attachment to the game since, in a lot of ways, that game saved her entire vtuber career.