You'll love Patapon if you:
- like fighting the same bosses who get more and more difficult (up to level 99, I believe), in order to strengthen your army
- like rhythm-based games with insane (in a good way) music
- have a younger sibling/girlfriend who likes cute little eyeballs of doom
- like crazy Japanese video games in general!
I got a
little less than 20hours of gameplay going through the story this the first time, but I didn't do too much grinding for items and the like.
I'll definitely replay this as soon as I get through the other things in my collection.
My only criticisms for the game are
- the lack of a pause function
- no multiplayer (it would have been great to fight someone else's actual army)
At $20, you can't go wrong.