Oh dear, reading this makes me want to make a shameful confession. My name is MisterBenn, and my yet to play list contains zero games!!! I play entirely too many games but I haven't got that kind of giant backlog like you lot. Is that all down to Steam sales? You guys certainly do seem to foam at the mouth when it's the season!
What I do have, however, is a list of "games that I played some of and then parked to go back to". Do those count? If so I have SpaceChem, Orcs Must Die and Kerbal Space Program waiting to be played to exhaustion.
Oh and Mashiki, FWIW I thought Civ 5 was a disappointment. It improved on Civ 4 in terms of accessibility, speed and aesthetics, but in the streamlining they threw out some of the richness and flavour of the prequels. Where previously the game mechanics were more organic and based on the real world, those in Civ 5 seemed more arbitrary and self-fulfilling, which gave the game more of a board game feel than a world simulator. It's a case of taste of course but the game has been controversial for this so even at a low price I would make sure I've done some research. By coincidence I admitted to myself that I won't go back to Civ 5 and I started a new game with Civ 4...