I’m supposed to go every eight weeks but it usually turns into a few months. I deter the inane chatter by “resting” my eyes and telling them not to be surprised if I fall asleep.
Once every couple years. Whenever the queue gets long enough to get trapped between my lower back and the seatback of the car, because that makes it painful to drive properly (turning my head to check for blind-spot traffic is distractingly painful).
“Haircut” in this sense is “lop off the bottom foot or so of the ponytail”.
I see my barber about every month. He’s a barber who’ll chat if you’re chatty, and shut up if you’re not. $10 a cut. He also has a pool table in the shop, and customers can play for free. Others…can’t play.
Everyday. I shave my head. I like to keep it clean.
I shaved for a few years. One reason I stopped was because I had to have a smooooooth dome, so I was shaving twice daily and it got to be too much effort.
I miss splashing cold water on a bald head on a steamy summer day.
Every couple weeks. I have the same feeling about haircuts as I do mowing the lawn - just shorten it, style is no object.
I absolutely hate the entire process, especially the small talk.
For that reason, I spent twenty bucks on a pair (?) of clippers many years ago and have the wife do it every 4-6 weeks or so.
Now, if only I could get her to cut out the chatter.
mmm
I suppose I look terribly antisocial because I don’t have to deal with chatter or small talk when I get haircuts except maybe listening to the stylist talk with someone else. If the haircut is done according to my specifications, I can go a few months until the next haircut. Otherwise, I may go back in a few weeks especially if they’re offering a reduced price at the time.
Once every 4 weeks or so. I like my hair short trimmed on the sides and back.
At my local barber in Japan:
cut, shave, shampoo, head massage, a little hair mousse, blow dry
(25 minutes, about US$17.00)
And NO small talk.
Feeling and looking good and fresh. 
My meds killed off so much of what was on my head that I hit it myself about every 6-8 weeks and let the barber do it maybe every second or third time. I trim/groom my beard (I got much more there to deal with) every week or three.
I like my barber quite a bit and wish I had more hair so I could justify going there more often. He plays a lot of old music from the 1900-40 era and still plays vinyl. I find him and the other customers fascinating and in many ways like the usual assortment of Dopers in the average thread.
How long was your hair? Is it possible she was shocked, shocked at how little it had grown in all that time?
Huh. I always pictured you with hair like this:
http://toolsaroundthehouse.com/wp-content/uploads/lawn-pattern-checkerboard.jpg
I make a point to get it cut every 3 months now, on the 28th. On my birthday in April, I get it cut and colored.
I am jealous of men who can go get a nice fresh trim every couple weeks. I suppose I could but it wouldn’t make that much of a difference, and it would be expensive.
A guy I know gets his hair cut every 21 days, and has done this for years. He never looks like he needs a haircut and also never looks like he just got a haircut. It’s actually a little creepy.
Every Sunday whether I need it or not. I wish I had the dedication to shave my head but…
Maybe three or four inches at the longest? Just enough to get a bit of a curl at the end that needed to come up, and enough that the front would get into my eyes every so often. Maybe 2/3rds of the Anakin.
I don’t think my hair growth is particularly odd. She did ask if there was some reason it was so long ago, so I think it was the time period and not the length.
Every three weeks ideally, but it can stretch to four depending on how long my hair gets/how my cowlick is acting/how much it pisses me off.
I go to whatever cheapo place I run across.
I guess I’m the only one who likes the inane chatter. 
I don’t go get it cut. I cut it myself.
I give myself a trim every day. It’s not (just) that my hair grows fast. It’s also that I’m very very very particular about my hair. I have a low tolerance for anything resembling a cowlick, and I’m quite compulsive about symmetry and evenness. The fact that my head is multi-textured (different “regions” have different degrees of curliness) only exacerbates things.
At one time in my life, I suffered from moderate trichotillomania. I think my hair-cutting is just a more high-tech version of my hair-pulling habit.
My barber is one of the most interesting people I know. He learned barbering in prison, and his shop is a local “success story”. We are close enough in age that he asks me to back him up when he tells kids how things were “back in the day”.