I don't know if I'd call it a flaw, but when people do something even slightly inconsiderate I get a total bloodrage and want to kill them.
For example my housem8 who's room is right next to mine not shutting his door quietly when he goes to the toilet late at night. My housem8 not washing out the shower when he's done, but leaving it full of pubes and ****. My housem8 using my baking tray and then putting it back in my cupboard still encrusted with grease and fat. My housem8 contracting scabies and then not making any effort at all to clean the house, hoover the carpets etc.
I get sooo ****ed but at the same time I feel they are all stupid insignificant things that are just standard for student life, and that I'd just be an ass for pointing any of them out. So I end up just stewing in my own juices, punching walls, grinding my teeth etc, and then taking my rage out on totally innocent people who don't deserve it! I know if I tried talking to him I'd go completely ape*** and gut him like a fish, so I have to keep it bottled up.
Also, everytime I get a headache, random chest pain, etc, I break out in a cold sweat and think I'm gonna die. I find it hard to believe that this bag of flesh we call a body is going to keep me alive for 80 years, makes me feel so fragile like I could just drop dead at any moment.