Anything that has amazing guitare riffs in it, lots of drums, ands heavyness is ok in my books!
E.G. Iron Maiden, Green Day, Linkin Park, Bullet For My Valentine etc
Edit:
Emo stands for Emotional Rock. So in theory it could be the emotion of sadness, and anger towards people. But not all emo rock makes you want to kill yourslef! Emo's tend to be stereo typed as the sort of person who self harms, and we all know this is not neccessarily true! Just because you like that type of music, doesnt mean you slit your wrists, or want to kill yourself?!?!?