I think it’s a mixture of both. His videos, he wanted to to seem dark and evil but even then if you look at his body building forum posts he had a big ego.
“You have vandalized my heart, raped my soul and torched my conscience. You thought it was one pathetic, bored life you were extinguishing."
- Seung Hui Cho
“There isn’t an open sky or endless field to be found where I reside, not is there light or salvation to be discovered. Right about now I feel as low as I ever have. So fucking naive man, so fucking naive. Always expecting change when I know nothing ever changes… I sacrifice no more for others, part of me has fucking died and I hate this shit. I’m living every mans nightmare and that single fact alone is kicking my ass.”