i have been giving myself undercut fades with a clipper for 6 years now. I use a wall mirror and a handheld and it takes a while but is pretty satisfying. It feels like an omage to all of the people before me that cut their own hair before barbers existed.
I think The scene in Chronicles of Riddick where he shaves his head with some nasty motor grease and a home made knife really set it in my mind that its badass to cut your own hair.
One year I was on a bridge painting project and while at a 7-11 getting coffee one morning one of the painters whips out some clippers and starts buzz cutting his hair revealing a skull covered with flame tatoos. Others on the crew and I were standing there kinda stunned when this guy walks up and says "I want you"... The guy with the flames says "what?" The other guy says "I want you in my movie". Turns out the other guy was some kind of talent scout for the movie 'silence of the lamb' .
I've never seen the movie so I don't know if the flame guy played in it or not. But it was an interesting way to start an otherwise routine day at work.