To the mane I errr.. pull it? Lol, my mare is a show horse and her mane gets kept at about 2.5". Her mane is way, way too thick and annoying if I don't keep up on it.
I keep tails in tailbags pretty much 24/7.. for the show horse it only comes down when being bathed (same for the not-a-show-horse horse), and when the fakie is in. I use cowboy magic on the tangles what-not. Love that stuff! The show horse especially is blessed in the hair department (more than I prefer, actually!) so I really don't do much with it.
The pasture puff as a long mane, but I still don't do much with it. Brush it once and a while.. sometimes braid. I've been thinking about roaching (or pulling) it just because I hate dealing with long manes.