more original

it's spelled Gryffindor

I would've chosen Vampires-Werewolves if it wasn't Twilight.

ony cos te vampires and werewolves try nd kil each other!!! the slytherins and gryfindors dont!!! exept snape and harry and voldemort!!!

they wer actualy burnin to kill each other
som gryfinndors actualy lost it and try to beat each other up
it was the school rules that made them "peaceful"

The Slytherin/Gryffindor conflict ended up being Death Eaters/Order which kinda resulted in a couple of wars. The Vampire/Werewolf - sorry - Pixie/Shapeshifter conflict was kinda stupid.
Jacob: I hate you
Edward: I hate you more
Jacob: OMG I just fell in love with your newborn baby.
Edward: Let's be best friends!
Me: WTF????!?!?

^lol. so true.

oh, and during the war, wasn't Slytherin the only house who didn't want to fight against Voldy? Pansy even wanted to turn Harry over to Voldy.. lol. that part was hilarious.

The werewolves-vampires conflict is kind of unoriginal :\ I can see it everywhere to be honest.

I've heard some clever insults from the werewolves and vampires though.