I used to have one... it lasted all of three months :'D
I mean, it was fun to work on it: I was really into calligraphy at the time, so having a bullet journal gave me an excuse to practice. I also loved coming up with page designs and whatnot, but as for keeping track of everything I did... EH XD the only thing I would use it for was listing things I would have wanted to do on a given day (draw, write, post on my blog, work-related stuff) and then add a little symbol next to the tasks I completed. More often than not, I'd just end up filling the list one day later only with the task I completed, pretending the ones I didn't complete never existed :'D sometimes I'd also list books/series/movies I wanted to see and/or ideas for stuff to post on my blog, buuuuut... after a while, I gave up and went back to writing my lists and ideas on whatever piece of paper I have at my disposal :'D I still use pretty calligraphy on my post-it notes, though
I'm afraid daily journaling is not something I'm very good at...