Short answer, No. Nothing really serious. I've never had a real gun pointed at me, I've never been physically attacked outside of school fights.
My parents house was broken into a couple of years ago. Even though I had moved out many years ago, the house was still "home" where I grew up. The breakin felt like a violation of some kind. Lucky for the kids that did it (that got caught later) that I didn't catch em in the act. I can only imagine what it must feel like to be a victim of a real serious crime.
Rape is a terrible crime that makes my blood boil for some reason. If I was to catch someone in the act of raping someone, I could see myself losing my cool and exacting a terrible vengeance on the attacker. Killing a rapist is doing society a favor.