Time and thought changed my opinion
After I watched Simon Killer, I was so upset. I was shaking because I hated it so much. I've seen lots of disturbing stuff and this easily is up in the top--from a psychological stand, this movie is terrifying. I hated the character of Simon so much because he felt so real. I feel like people like him are much more common than we as humanity would like to believe. People who lie and manipulate and are right on the cusp of potentially being dangerous. I was very upset by it. I think I rated it a 5 afterwards.
But I noticed that I literally couldn't stop thinking about this movie. For about 4 months, I swear I thought about Simon Killer every single day. Honest. It affected me so much that my brain was blown away by it. Little by little, I began finding things I really liked about it. Things I dust like became things I quite admired. I've now rated it a 9 and I think it deserves it.
It's not easy to sit through and it's not a very likable movie. Nobody is worth rooting for. Simon is a psychopath waiting to happen, and we as the audience, know it. But any movie that makes me think about it so much that I go from hating it to loving it in a matter of months, is something worthy of a bit of respect in my book. I can now say I loved it. Not quite sure when I'll be watching it again, but still. Man oh man, what a film!