Someone posted a Jackson Galaxy video a couple days ago where he mentioned tortitude and how it is a real phenomenon. I adopted a torbie/calico (only her paws and under carriage are white) and never before heard of torties having a particular attitude. Mine definitely does! I have also had two dilute calicos in the past and had been told that calicos in general can have a real attitude. I chalked this up to sexism as calicos are almost all females. One of those girls was very possessive of me and would keep my schedule. If I wasn't in the shower or bed 'on time' she would stare at me and sometimes yell at me to get moving. My torbieco (this is my current kitten) has not tried to control me yet, but while she is friendly to other people, it's obvious she does not give a shit about any human but me. Where my dilute calico loved me most but absolutely liked and had time for other people. My other dilute calico doesn't really count she was hand raised by humans and didn't know she was a cat.
Dilute calicos, etc are grey, tan, and white rather than black, red, and white.
Have you had dilute and regular calicos/torties/torbies? Have the dilute ones had less attitude? Have you found the darker colored ones to be more intense personality wise? Is this more a general variation of cat personalities?
I was talking to my mom about tortitude and tabby genetics (also found here on Ovarit!) and she speculated on a difference based on color intensity/ personality intensity in calicos/torties/torbies vs their dilute counterparts.