If someone was impersonating them, what would friends / family ask or do to tell the difference?
What common etiquette do they disagree with? Do they still follow it?
How many hobbies have they attempted to have over their lifetime? Is there a common theme? (TELL ME ABOUT BIFF (AND THE BOYS IF YOU WANT THE ADDED WORK))
If someone was impersonating them, what would friends / family ask or do to tell the difference?
Hmm... I think if it's a timeline where Tiff exists, they'd ask about her. Biff will go on forever about his daughter and all her accomplishments, how proud he is, how much he enjoys being a father, he would do anything for her!
What common etiquette do they disagree with? Do they still follow it?
He thinks the whole "How are you?" "Fine, how are you?" "Fine." exchange people go through every time they greet each other is incredibly stupid. What's the point of asking a question like that if no one cares about the answer? Why add this whole back-and-forth, just start the goddamn conversation already!
He still asks the question to friends, but he's expecting an honest answer and won't accept a "fine" if he can tell they aren't fine. "You say fine, but you look like shit." or "If it's just fine, why're you smiling like you just won a million bucks?" If a stranger/acquaintance asks the question, he's telling the truth, social script be damned.
How many hobbies have they attempted to have over their lifetime? Is there a common theme?
Biff is typically very single-minded when it comes to his interests. In his teen years he discovered a love for cars and it's stuck with him since. He'd memorize every new model as it was released and learned everything there was to know about maintenance. His auto detailing business was his dream job, which he only realized after starting it.
In better timelines, I think he and George (who has a scarily good memory, even though he isn't that into cars) will sit out on the porch with a couple beers and have friendly competitions over who can name models the fastest as they drive by.
3-D is all over the place. Movies are his main interest but he will bounce around trying every hobby and sport under the sun. Guitar, baseball, painting, hockey, there is an overflowing box in his attic with supplies from all his discarded hobbies. The only thing that's managed to stick is jigsaw puzzles, which draw his attention in a way that only film can. He'll hyperfocus on a thousand-piece puzzle for hours.
Slick, if 3-D isn't dragging him along to one of his hobbies, enjoys bowling and what the boys call his "old men activities." He loves brain puzzles like sudoku and crosswords. He probably bird watches. When they're hanging around outdoors he'll be staring up at the clouds and pointing out weird shapes.
