"Kinky", by definition, means non-standard sexual behavior. But who defines standard? It's all subjective. It's a matter of degrees. For some people, kink is anything beyond missionary-position-un der-the-covers-with-th e-lights-off. Personally, because my Mistress and i are 24/7, all of Oour sex and play is "kinky" because it all has that element of D/s, even if the acts Wwe are engaging in wouldn't typically fall under the BDSM umbrella. Oour attitudes and intentions are always reflective of Oour D/s dynamic. Generally speaking though, "kink" encompasses anything and everything beyond whatever you define as "vanilla". It can be as simple as a change in demeanor or attitude and may have absolutely nothing to do with toys or equipment.
My personal list of kinks is extensive. It includes many things from basic sexual acts to some edge play and lots of stuff in between. If you include my voyeuristic interests, the list is pretty exhaustive. When it comes to what i'm comfortable watching, there are only a few things i'll turn away from, not including obviously illegal and/or non-consensual acts.