I think it's all relative. To me? A bobber is like a chopper, in that it has had all of the stuff 'removed' (chopped/bobbed) to lean it up a bit. But what seperates, in my mind, a bobber and a chopper in the sense of what you see today, is that a bobber pretty much only takes stuff off, it doesn't really put anything new on. A chopper, in my mind, is full of new stuff. Remove the fender and put a new one on, instead of cutting the old one. Ape hangars, big chrome rims, etc.
Of course, to others, that same bike is a 'bobber' that I called a 'chopper' and vice versa.
6 in one hand. Half a dozen in the other!
"8 But God demonstrates his own love for us in this: While we were still sinners, Christ died for us."
Romans 5:8 (NIV)
2014 Kawasaki Vulcan 1700 Vaquero ABS SE
iPod Connector Kit, Kuryakyn Highway Pegs, Mustang Touring Seat, Marvella's Hitch, Kuryakyn Trailer Wiring Kit, Haul-Master Tag-a-Long Cargo Trailer
2011 Honda Shadow Aero 750 (Wife's)
Memphis shades quick-release windshield, OEM Solo Seat, Mustang Fender Bib, Chrome Solo Luggage Rack
Past: 2006 Vulcan 900 Classic LT