I'm not a gearhead and never was, but there's a piece of me that wishes I'd had some time working on cars growing up. The most popular show about cars on the planet, Top Gear, makes this inclination grow exponentially when my wife and I flip channels and come across it.
The 11th and 12th Seasons of the show hit DVD a few weeks ago. Season 11 is just the episodes, but Season 12 includes some commentaries and longer cuts of select episodes. The commentary tracks aren't terribly illuminating, but if you're a slavish fan of the show, it's more of what you get in the show itself.