Platformers. I'm pretty sure not many people bothered with games like sPRay, Death Jr. II, Mushroom Men, or The Kore Gang on Wii, but I'll scoop up even iffy platformers just because I'm a whore for the genre. And yeah, it definitely backfires sometimes.
Looking through my backlog I've noticed that most belong to a certain genre. JRPG's tend to pile up in my backlog due to worry of being scarce or small print runs. I keep buying them even though I haven't opened half of them (Xenoblade, Fire Emblem, Persona Golden to name a few). So GAF which genres do you pile up on?
JRPGs. I then end up not playing them, even when I get around to going through my backlog.
Tragic, really.