Long coated anything seems to be more docile I've found. Take the cat breeds? Why is that? Does anyone know why?Yes and no -Persians are THE most docile of all cat breeds, Exotics (=shorthaired Persians) are most definitely not AS docile, and the semi longhairs (which will include Maine Coons, Birman, Norwegians etc etc as well as any longhaired moggy, the ONLY true longhaired cat is the Persian, all others are semi LH) -are even less docile than Exotics and Maine Coons could never be described as docile. (It's usually (That ***** cat!!!! in our household! or "that THING of yours!" when mentioning hubby's Maine Coons)
Personally I'd say it's all down to the breeds behind them. Persians being such an old breed, the most popular breed for so many years, always bred ONLY as show cats and pets, not as rat catchers -everyone wanted them docile and cuddly. Exotic is originally Persian x British SH (UK) or Persian x American SH (US) and the influence of the other breed/s (US Exotics also had Burmese crossed in at one point) made the temperament different to the Persians. As most Exotic SH carry the gene for LH, you tend to get longhaired kittens in the litters as well. These LOOK identical to Persians, and genetically they ARE identical. Indeed many registries across the world DO register them as Persians -under the GCCF they are Exotic Variants or Exotic Longhairs and cannot be shown.(But can be bred from to shorthairs.) I can honestly say that a longhaired Exotic is NOT as docile as a Persian, despite having the exact same look (if you did not KNOW the breeding, you could never ever tell a LH Exotic and a Persian apart just by looks). The LH Exotic will still have the Exotic temperament and they truly are not as much lap cats as Persians.
So I'd say what matters is the background, not the coat.
But I still stand by what I always say about colours in cats, there there is a definite tendency with for instance cream self being about the calmest you can get and reds being a lot more energetic, despite the fact that it is the same colour where the cream has just had the dilution gene added. :)