Favorite and least Favorite Characters.
Favorite would have to be Jim and Tony, they younger brother and sidekick.
They seem so disconnected from the rest of society, and Jim has a cool "I don't give a sh*t attitude. Plus the buildup about meeting Charlie, whose brief role is played brilliantly by Quaid.
Least Favorite is Tom. What a tool he was. He gets Bill kicked out of his apartment, gets his GF almost fired, and has the worst line ever in a movie, "It's Casual." WTF is that?