I've definitely dealt with the type before. Some are just loud, oblivious extroverts. Others are like your family, domineering and obnoxious. Can't stand the conversation not centered around them.

It might be a bit childish, but going broken record on people seems to work for me. If I'm cut off mid sentence for no good- good- good- good- Sounding like a malfunctioning robot puts most of those people off their game and I can pick up right where I left off. Repeat as needed.

The other route I got is like the others. If you can't get them to work with you, walk away. Don't even say a word. If they want to cut you off mid-sentence, walk away mid-sentence. If they whine about rudeness, remind them "tit for tat."