I'm a pretty big FFX fanboi, and I had to admit that I hated Blitz at first. After I started running out of things to do though (I really played that game way too much), I got into Blitzball, and, surprisingly, loved it. Once you recruit a player or two and are able to actually win, and you know what's going on, it's amazingly fun. Even more so once you get all the best players, and start creaming everyone else. By the end I could score every time from my own goal (fully upgraded Tidus with Jecht Shot III or something along those lines), and it became a race to see how many goals I actually had time to make.

Anyway, good times. You might want to try it for an hour or two if you ever go back to FFX.