Tom Riddle is
Tormented, by the orphanage children for being different and having powers they can only dream of, and the Hogwarts students for being in Slytherin. He is an outcast and he hates it, he will have revenge
Orphan, his mother died during childbirth and his father abandoned him, this is one of the reasons he hates muggles
Moaning Myrtle was his first human kill, the first of many
Riddle, it's hard to figure him out but the answer is staring you in the face
Immortality is his life goal and he will do anything to get it even kill innocent children
Death is one of the only things he is afraid of and in the end is his downfall
Death-eaters follow him, trust worthy allies or not
Listened to part of the prophecy which was his part of his down fall
Evil, maybe not always, but evil still