Plastic bobbins for me, though I occasionally use up the cardboard ones that come with bobbin boxes for little odds and ends. I wind by hand, and haven't ever timed myself

, but I think probably a few mintes -- if the thread is relatively thin, like metallics or some silks, or things like Wildflower thread, it takes a bit longer because i like to keep them neat. The thicker the thread, the quicker the wind, I find!