Meh, ill skip it
But...but...100% completion!
I do get annoyed at the trend to add mini-games of 100% completion. I'd rather focus on the game itself and not the little scavenger hunts.
Although, I complain less when there's an in-game benefit to the scavenger hunt but only if it's progressive. Usually, I don't feel it's worth getting 100% for the benefit they offer, but it's nice if there is something that happens at the 20% mark and again at the 50% mark. The Grand Theft Auto games had something like this.
I say that I don't do 100% completion, but I still got all of the stars in Super Mario Galaxy, which was no small feat considering the difficulty of a few of them. I gave up the idea of getting 100% on Super Mario Galaxy 2, though. My patience can only last so long.
I don't mind scavenger hunts so much if they took very little effort (and, thus, money) to add. I don't want a portion of my purchase to be put toward something that I'm just not going to care about.