I sometimes wonder to what extent the "attitude" has to do with the coloring and to what degree it has to do with the sex, since almost all tri-colors are female (except for the rare XXY boy). Often the things that I hear people blame on tri-colors are the same things that I hear others blame on female cats in general.
Pandora is a funny cat. A beautiful tortoiseshell, and she adores people--flopping and chirping and doing whatever she can for attention. She has serious issues with other cats, though. I lived in a rooming house with many other kitties/owners, and before she was fixed and still weighed only 5 pounds, she attacked a big white fluffy cat almost three times her weight when she caught him "paintballing" our door. They fought down two flights of stairs until one of them lost their bodily functions. She's spend a lot of time grumiply guarding our room (her territory) from other cats. She only tollerated 2 of the 3 house-roaming males and barely tolerated the female "teen" kitty that got introduced later. Mercia would try to ambush Pandora, who would just sit there and reach out and bonk her on the head. Mercia, not being the swiftest kitty on the block, would shake her head once, sit back, then try the exact same thing again several times in a row, each time with the same response. It was kind of amusing. After we moved and my husband and I got a place where we could keep her permanently, I found Pandora was a lot better behaved when she had a whole apartment to herself. As much as I loved having my kitty share my room with me when I was at school, she was happier at home with him. Now, though, she sometimes seems a little depressed, so we're cautiously approaching the idea of getting her a pal. It'll have to be a cat that'll drop down immediately and kiss her toes, though, or it'll never work.
Pandora also has real tortitude moments with people, though. Her most famous one is if I'm on the phone with one of my family members and not talking directly to her, she'll jump up on the table. She knows she's not supposed to be there, and any other time she ignores it, but she makes sure I'm watching and then jumps right up and looks straight at me. So naughty!