Fingerprint reader and Pattern. I like that I'm not potentially exposing my pattern to people anymore, although I still have to enter it on reboot. It's really quick, at least for my S7 Edge.
I don't. I used to in the past but right now I can't be bothered to put a swipe pattern. Lazy me I know.
I use fingerprint scanner and a password (PINs are too simple for others to remember if they see me put it in). I use a Samsung Galaxy S7.