1. What do you think Dean would do if Sam took the Impala to get pimped on Pimp My Ride?
He will go Grrr...Argh!
2. The writers have made it clear they've got no problem using a monster twice (shapeshifter in "Skin" as well as "Nightshifter", for example), so which character (human or demon) from season 1 or 2 would you like to see in season 3 again and why?
How about another family as the Benders? I wanna that little girl back! *ehm, sorry, Dean*
3. Why do you think Kripke hasn't made Sam and Dean say "I love you" to each other when other TV brothers (Peter and Nathan Petrelli from NBC's Heroes, for example) who are just as badass have already crossed this bridge?
Because they were raised in this way. They remind me of Jack and Ennis from Brokeback Mountain. They never said I love you to each other, to their wives or their sons and daughters. The love is in their eyes and is always present.
4. Sam and Dean are always putting on random costumes and such to sneak into places or just to blend in. What is one disguise they would not be able to pull off? Please explain.
They can't appear totally naked *sighs* because there's a censorship. *sighs*
5. If Sam were to write an autobiography, what would it be called? How about Dean's autobiography?
Do they have the time to write an autobiography? Really?
I would name it There and (Hopefully) Back Again by Sam and Dean Winchester. Just because Frodo suggested it *thank you, Frodo!*