Immerse Yourself into an Alternate Realm

Let's say that one day, I've built a device that allows you to transfer through dimensions and thus, make yourself into the world of video games. In fact, it can be any video game of your choice. Of course, there are a couple of side effects; one, you're going to have to play a certain role of the video game character in the game (hero, villain, or otherwise) that you've jumped in, and two, you can't jump out until your role is done.

Now, of course, knowing this, first, what video game do you see yourself coming into? What video game character would you be? What would you do in that game world? Would you do the video game character's role differently? What would you do? (eg. Let's say you're Bowser; you might decide to kidnap Daisy instead of Peach for whatever reason). Have any other ideas?