There are only a small number of witnesses that I speak with on a regular basis. @jackmiller is one and is one witness who I personally think deserves a lot more attention that he is currently getting.
Jack jumps on board with any project that he thinks is beneficial to Steem and Steemit.
A little while ago I opened an online store selling Steem merchandise. When I told Jack about my store he jumped in and bought His entire family Steem shirts. He's donated a tonne of prizes to competitions, including competitions that I've run myself, and is always there to have a chat and offer advice when needed.
In my mind, this guy should be ranking much higher in the witness ranks than he currently is. So it would be awesome if you could throw a vote his way.