I made the mistake of buying a bunch of....baddish games. Not baddish so much as 3 of them (out of 5) were pretty much the same game.
Rune Factory, Final Fantasy 3, and Pokemon are essentially the same game, you basically go around and level up...which is unfortunate. Rune Factory is hella boring too, it gets to a point where I was just like "ok...I'm 80% through the game, I married my chick, expanded my house, upgraded 90% of my stuff.....what's the point?" FF just got annoying, and Pokemon Diamond just sucks.
Game Four I have is Super Mario 64...I don't know WHY I bought this game...I didn't even like Super Mario 64 all that much.
The last game I have is Phantom Hourglass, and seriously...I haven't given it too much love lately either, it just got....I donno...repetitive? Boring? ehh, I'm lazy.
I sometimes kick myself for getting a DS instead of a PSP...but honestly, I much prefer the attitude that Nintendo has towards their gamers than Sony does. But that said I haven't given my DS any love for....2 months.