And RedSon, I have your next obsession for you: Pandemic Legacy. The conceit is that each player is a role from the original Pandemic game, and you're working together over the course of a year to cure four diseases, just like in the original game. But this one turns Pandemic into a campaign-style game, kind of like Imperial Assault, where your characters and the board itself change over time. You'll be applying stickers to the board to alter it, and new rules will crop up over the 12-24 possible playthroughs (you play each "month" 1-2 times, depending on whether you win the first time). You'll want to play it with the same group every time, and it only goes up to 4 (so maybe one from your Imperial Assault group will be left out).
I've been really anticipating this since it was announced. I really like Pandemic, and I enjoyed Risk Legacy, which was a similar campaign concept with Risk. Pandemic is a much better (and cooperative, which I love) game than Risk, so my group was really excited for this one. It just came out this week, and my group played through three games on Friday (lost 1, won 2), and I can't wait to sit down and play it again. Super, super fun, and it's really smart the way they adjust the difficulty level between games so you don't win or lose too often in a row. I can't recommend it highly enough, especially for someone who already loves Pandemic.