Specific dream bike would be the bike my Dad salvaged in the mid '70's, stripped down, repainted the frame bright orange, meticulously rebuilt all of the pieces, and maintained for each of my older siblings and I to ride and abuse over the next 15 years. Each time it passed from one kid to the next, he would repeat the process. Lugged steel frame, down tube shifters. Don't know what happened to it but would kill to have it back.