[Kwaz]

I'm completely torn on this one. Results orientated thinking would have me believe that your choice of play was a stellar one. But what went through my head when I saw the hand was:

-The pot is huge.
-A donk theoretically offers less protection because whether or not they think about it, you're offering better odds to stay in because the other players no longer have to fear a c/r from you.
-The king hi flop makes a raise from a weaker button hand much less likely.

-Had Button only raised, I'd say there's a high enough risk of the flop getting checked through to warrant the bet. But seeing as he 3bet, I'm not sure that's really much of a concern.
-If you were folding if it came back two to you, the donk is probably a good play as it might protect against folding the best hand to a c/r from a weaker hand in the blind.
-You raised preflop so you can strongly represent the king.

My head hurts.