You have to watch out for the occassional "hair ball" using the suck up the thread method. There is nothing quite like gasping and spitting to get that little sucker of a "hair ball" out of your throat. That is why I stopped using it when I first tied commercially some 30 years ago.
A dental floss loop threader makes a very fine bobbin threader if you do not want to spend to money for one of Rainey's bobbin Threaders, which have a little hook on the end of a straight shaft to catch your thread on. Far easier to use than the wire loop threaders, even if it costs a bit more than the rest of the bobbing threaders out there.