I liked Blitzball. I thought it was fun, not the funnest thing in the world, but fun enough. When you have no more techs to copy, then it can get kind of boring. But I was only at level 30ish when I got the Jupiter Sigil and had only gotten all the key techs for Tidus, Keepa and Botta, so I never got bored with it. I can imagine that if I kept playing to a point where there were no more techs to copy and I was just blitzing, then it would get old.

You can get my Nimrook by withering him, or with the Jecht Shot right by him, and the Sphere Shot sometimes works as well.