I don't know anything about purebreds and their habits, but I am sure that it will vary with individuals. I wish you luck in your search. I would like to add to try not to limit yourself to "Maine Coon only" because you could miss out on a very special cat, maybe the least likely one you'd ever expect, if you don't keep an open mind

When I adopted Monte (my all white cat) he was the furthest thing from my mind. I was at a shelter trying very hard to make friends with a domestic long hair named Ivan. And all the while Monte was pestering me for attention. He was SO persistant!!! I even remember saying to him. "OH ALL RIGHT !!! I will hold you!". Well it was fate and almost 4 years later I still can't believe how I almost missed my soul-mate cat by thinking I wanted something else.