Metallica - Best dots on a Stern game ever, cool 'original' theme and toys (meaning feels the least like a license), hand drawn art, great rules, lots of ways to play. Really complete package that doesn't have any glaring flaws. I have the LE, the mirrored backglass makes me happy.

Tron - Best simple 'one more game', best integration of music and theme, just feels good to play, and with the fiber optics (LE or aftermarket) and sound and atmosphere it just transports me into the right mood. Bonus for having the arcade cab mod, it might not be stock, but it's one of the coolest add-ons for any game.

Games like LOTR and TSPP are very cool, but at the end of the day I'm not a Keith ruleset person, I just don't like the super long quest style games. Amazingly done, but too involved. I don't want to have to feel like I need a really long game to get somewhere. So not for me. I just sold my ACDC, don't miss it. Metallica and Tron would be a lot harder to get rid of.