Top 10 Mario Power-Ups

I know this list has already been created on this site but I can do my own.

And just to make it clear I am not counting any invisibility and I am only looking at the main series Mario games.
The items in this list have been selected by the author of the list for you to vote and comment on.
The Top Ten
1 P-Wing
2 P-Acorn
3 Cape Feather
4 Propeller Mushroom
5 Super Bell
6 Cloud Flower
7 Penguin Suit
8 Goomba's Shoe
9 Fire Flower
10 Shellmet