Explanation: Wether it is earth, fire, air or water or even all of them, you can control that element. That means you can manipulate their pysichal form and with just thoughts and make an inferno for example. In good purposes it can be used to protect but in evil purposes it is used to hurt.
As a person you are slightly 'odd'. People see you as different and probably has prejudices against you. They see you as 'weird' or the 'freak', and either that hurts really much or you chose to ignore it. You keep your hatred for people inside and probably daydream about killing them, which gives you satisfaction. Truth is you are not evil, only missunderstood and mistreated.
Negative aspects: Since you have deep problems inside you could get into some sort of mental illness or simply get depressed (if you aren't already).