I started with and original Canon F1 and switched to a Nikon F's early on. I could buy used Nikkor lens, couldn't find used Canon FD or BH/Canon lens, where I lived at the time (pre-internet). While I haven't switched from Nikon since (now using a F3HP MD-4 and a EL2 w/winder) I always regretted selling the Canon. Recently sold two black Nikon F's (FTN w/F-36 drive) and while missing them, was offered an outlandish amount of money for them (bought a Zone VI camera, had Richard Ritter add a bail, and 210mm 5.6 Fujinon, and a few other LF odds and ends from the proceeds).