I am pretty sure I would have had pretty close to 1000 excelents when I finished the game, had I not realized what actually made a hammer attack be "excelent" only by late world 5 (until I accidently waited "too long," I had presumed I was supposed to hit the button right when the hammer started to shine). .
I am the Hunter of Topics. My post never fails to kill its prey. *pounces* Nyaa!
In the victory parade at the end, toads march along with all of your achievement flags, open or closed. They will all be unfurled if you have earned them all.
Worth getting 100% for? Not particularly.
If I decide to go for my last achievement flag, I probably won't bother watching the parade. It's just about closure, being able to say, 'I did everything and now I'm done. There's nothing more to see or do here, folks.'
Video games ruined my life! Fortunately, I still have 2 lives left.