For me the hardest from the games i own has to be getting all 180 medallion things on Sonic 2. I usually tend to finishe a game beginning to end before i start another, and Sonic Adventure 2 is the only game whiche i havnt finished completely yet, that i dont play with anymore. Not to brag or anything ,but i consider myself a more than average gamer, I was given a god like talent when it comes to video games,ahahahaha! well compared to anyone i know. ^_^.
Rouge leader wasnt hard, just that last stage were u have to beat "Wave after wave of imperial planes". Oh god, i went brain dead a couple of times. Getting all SSBM trophies wasnt hard either, just got the list of the thing i had to do and went to work. Those Blue coins in Mario sunshine was just time consuming, not hard just had to look and look and look. Luigi's mansion was a breeze,lol, why even mention it. Metroid Prime i just tackled all at once and got everything except the Fusion suit cuse i dont own a gba or fusion.
And with Animal crossing, well I just got it at the begining of this year, so im far from nearly collecting everything in it.
Or how about this:
-getting all the gold Skulluta spider coins in OoT Master quest? I just passed the game but only have like 30!. Good grief.