100% agreed - this is by far one of the best, most original, and overall FUN games to come out in years. Completely insane, and addicting as hell!
Not to mention it ALSO has one of the most original and catchy soundtracks EVER. The kind of soundtrack where you go "wtf?" when you first hear it, then without even realizing it find yourself humming the theme song standing in the checkout line at the local supermarket...
Anyone and everyone who calls themselves a GAMER owes it to themselves to find this and play it, no matter what their preferred genre of game. (It also kind of defies genre categorization). And even those who DON'T consider themselves gamers should play it. You learn the controls in a matter of seconds. For more in-depth info, here's a page on wikipedia about it:
http://en.wikipedia.org/wiki/Katamari- Sean