From my knowledge that i know of is that emo's are just really emotional people than others. As for qualification i'm not exactly sure what it is but my guess would have to be listening to punk bands, rock, metal, etc. The style of clothing can be similar to goths as for dark clothing, mostly black in my opinion and the make up as well. Thats my in take of emos, theres no definite answer in my opinion and for the cutting, its just a stereotype. Not all emo's cut themselves. Thats my intake of emos, if you have anymore questions, i'll be gladly to answer them.