There's an odd satisfaction to finishing off a game of solitaire. Double clicking each card even though you know you've won, it feels like the best part. Like finishing off the last numbers of a sudoku. Solitaire is an odd game, there's not really any strategy to it, (not that I know of, anyway), it seems like you get a deal that wins or you don't. I suppose there's a couple ways you can screw up, and there might be a solitaire expert out there that's like, "damn you kid, there's so much more to this game then you realize!" but to me it seems like when you play solitaire you're just going through the steps to see if you have a winner or not.
I still play it from time to time while waiting for this slow ass internet.