1. 50's Biff - This Biff gave Marty and George McFly the most problems. You can't beat the line: "Make like a tree and get outta here!"
2. 80's Biff - Hilarious to see 80's Biff trying to blame George McFly for the accident he caused while drinking beer no less. "Say hi to your mom for me."
3. Buford "Mad Dog" Tannen - Because I'm a sucker for westerns. "Listen up, Eastwood! I aim to shoot somebody today and I'd prefer it'd be you."
4. Old Biff - Good to see Biff carry all of his asshole and bullying tendencies w/ him to old age.
5. Griff - I love the Tannen family but Griff's voice annoyed the shit out of me. Thankfully his time on screen is short.