It's honestly a toss up between Pokemon, Minecraft, or World of Warcraft.
>Pokemon
Nothing ever happens that can't be solved by a ten year old kid and his dog that breathes fire. I also know everything that goes into competitive pokemon (Including broken bullshit) so I'd be able to do whatever I want.
>Minecraft
Alone for all eternity building the world into whatever you want it to be.
>World of Warcraft
Just be a mage. Decent income, world-ending threats are being taken care of by some other "Party of adventurers," and you can conjure food and water for free.