I haven’t done another official 365 since the project in 2015, but doing that project set me in the mindset of taking photos every day, and I still do that. Sometimes they’re just of my kids, dogs, and friends, but it all serves the same purpose: to help me keep my brain thinking about photography on some subliminal level, and this means that my eye is always on the lookout for photo opportunities.
If you haven’t ever done one then you should know that 365 projects are great for the purposes of teaching you about your own photographic interests and getting you into the good habit of using your camera every day.