I've always been paranoid about being out alone, night or otherwise. In the past 5-6 years crime has gotten bad here, there was a shooting right in front of my house a few years ago (I didn't see it happen, but I saw the man who'd been shot stumble into the street bleeding everywhere) and about a year later there was one nearby my girlfriend's house. Now, they're usually drug-related or something (not entirely random drive-bys or something) but still.
If I AM out at night, I make absolutely sure I'm with at least one of my other massive male friends, and carrying at least two knives. Realistically, as long as the person doesn't have a gun and they're not trained, I'm pretty sure I can handle it. I've been in a lot of fights in my life, at one point fighting off one of my own cousins who was swinging an axe at me. Especially if it's indoors. If it's indoors, in a small enclosed space? I'm set. I know, I know, it sounds like typical male over-confidence but I've done some awful things to people in the past, and I'm 100% aware that that specific part of me is a VERY big part of me.
I don't instigate, though. I mind my own damn business, don't take side streets, and cannot stress enough how anal I am about having someone else with me at all times. And the confidence thing...the confidence thing is so huge. I spent the first 3 years of living in this town getting the crap beat out of me on a daily basis, and I'm not exaggerating. I learned damn quick that with most people, if you make it obvious that you've got no qualms with curbstombing them, they'll piss of without much incident. But, then again that's me, and I have a serious tendency to gravitate towards violence in general.