Great post! I was wanting to write something similar, but being that I wrote a "what is a witness" guide a few months ago, it felt like I would just be re-hashing old content.
For those of you who have considering being a witness, but have been uncertain, don't be afraid to PM me on STEEMIT.CHAT. I've helped many witnesses get to where they are today, even @teamsteem :)
I totally second that.