Another interested lurker here. I have been bullet journaling on and off for the past 5-6 years and my BuJo's are messy, functional and forever changing. Currently using a Hobonichi Techno because I needed more structure, but I don't think I get much extra out of it that I couldn't do in a BuJo.
I'm the same as you guys in that I'm more of a lurker. Personally, I'm more interested in mixing digital and analog organizer and PKM systems than in pure bullet journaling. But I do like the blank canvas of a nice, fountain pen friendly, notebook.