I try to put a lot of hidden hints and "Easter eggs" in the comic. Some of them you may have noticed, but there are a few that you probably haven't. For example, there are some small tributes to my family that I have put in.
Nick - Nick is my brother's name! By the way, none of these characters look or act like anyone I know, even if names are inspired by them.
Ryan Chiropractic - Petunia's new office is in the same building as Ryan Chiropractic. I threw that in there because Ryan is my wife's maiden name (and now ONE of her middle names :P).
There are many more, which I may outline in future posts!