Subtle Mouse Click Feedback Effects

Recently, many cool interaction effects have been created that follow Google Material Design principles somehow. One of the great little effects seen around is the ripple click effect, also called click waves. While these effects are based on the place you click or touch, the whole idea of providing a subtle feedback effect is really interesting. Usually, subtle indicators are used in app showcases to visualize a tap on the mobile screen. But these kind of effects can actually be quite useful when applied to any click or touch interaction. The subtle feedback would indicate that the action element was actually hit, making the felt response time seem less if done appropriately.