One other thing that I find particularly interesting about Jim is how his mindset seem to have shifted over the years about certain aspects of his career.
Like first and foremost, he never intended on pursuing a career in puppetry, and he only got involved with it as a means to an end (which we pretty much already knew), and aside from SAM AND FRIENDS, really had no intentions of even continuing to do more with puppets afterwards, but after his European vacation, and seeing what a viable artform puppetry really is, sparked his interest, and inspired him to not only continue doing things with the Muppets, but trying to reinvent puppetry for future generations of audiences (which he did perfectly).
But even more interesting is we know Jim wanted to avoid the children's entertainer stigma as much as possible, between cringing at Ed Sullivan introducing the Muppets as, "Something for the kiddies," to being apprehensive about becoming a part of SST, to even flat-out telling people that puppets aren't just for kids and reminding people he's done adult stuff as well... though by the time we get to FR, he no longer seemed to be bothered by that, and even wanted to do projects specifically for children.