She's 9. I tried to get her into Oblivion three years ago, but despite her reading skills being up to it (she's in 4th grade, reading at the 12th grade level), the complexity of the game was too much for her. I suggested she go back to it this year and she's spent the better part of the past four months playing, so we've been hyping each other up for Skyrim.
It's been fun watching her go through Oblivion, exposing all the highs and lows along the way. When making a character, she asks why everyone looks like they were "carved from a potato". She's really annoyed that if she's caught stealing vegetables from the basement of a house, everyone in the universe instantly knows and is after her. I've been updating her on how those things are fixed in Skyrim, so she's sharing my excitement for it.
She plays the game in such a different way than I do, it's been fascinating to see how our play styles are reflections of our personalities. For both of us, Oblivion was our first open-world RPG. I didn't touch the main quest for a good 40 hours or so, because I love dungeons and exploring and just went wild with it. Her, she also didn't touch the main quest, but she doesn't like dungeons - the music freaks her out and she finds the closed quarters unpleasant; she prefers the open.
To make money she's a thief, raiding every damn house in the world. She cases shops and houses by day, and then re-visits the ones with stuff she wants at night to loot them. She's an alchemist, archer and thief, who largely avoids combat and just creates mischief. She's only done a few quests, but she's poured well over 60 hours into the game and loves it.
We've agreed to set off in opposite directions in our respective games on Friday, and see how different our own experiences are. It'll be the first game we really play together like that. It's going to be a lot of fun.