I'd cast a vote for Hobbit as well. I love the look and music of BK2000 but man the actual game gets old FAST, and I love system 11 stuff usually. The Guardians layout, theme, and same feeling modes just do nothing for me personally. Pinbot is a classic, but it's never really felt to me like a game I need to own, maybe I've just had my fill of playing it at this point though. Hobbit will keep you busy for a while and I like it a lot even though I generally don't like how widebodies play. If those are the games you're limited to I'd do Hobbit all day personally - but you're the one that has to live with it and play it so get the ones that are the most fun to YOU! You also have a smaller collection, so more games might give you better variety.