I have two female mojaves and one male mojave, and if pressed I might say they were a bit feistier than my other snakes, as they are the ones most likely to strike at me, but that's not necessarily a fair observation, considering those three mojaves are the only ones of my snakes I didn't acquire as hatchlings. All the rest of my collection was around 200g or less when I got them. 1.1 of the Mojos were 500g-ish and 0.1 Mojo was ~700g when I got them.

With regards to other species (besides ball pythons and cats) there is a casual observation at my work where we tend to see "black and tan" miniature pinschers being classicly high-strung, owner-focused, and typically protective of a particular family member. "Red" min pins are usually more mellow, and accepting of strangers. I can't say anyone else notices this trend, but it's a common topic at our hospital.

Also, another casual observation, I've noticed that the boyfriend's red-colored cornsnakes tend to be more mobile and snappy while we're cleaning their tubs.