I adore tabletop games. I am quite jealous of your shelf. Lots of classics and new classics. I think my current favorite is probably Quest for El Dorado. It's a good mix of strategy and a bit of luck. It's also very well balanced. Every time I've played it has been a close game.

For a group of 4-6, I like Coup. For a larger group, I like its companion game, The Resistance.

And for a cooperative game, I like Dead of Winter.