I wanted to capture some of the physicality of real buttons so I've been playing with this "soft divot" concept. It's a border style that creates an illusion of the button sitting flush on the page.
Skeuomorphic buttons have been around forever. What I think is different here is this idea of maintaining the button face on the same plane as its background.
It comes with three elevation levels: raised (+1), default (0) and sunken (-1). For primary actions you can choose the raised plane face. Then most other buttons, they can stay nicely on the default UI plane.
NickySlicks•42m ago