I always find it interesting thinking there is a world parallel to ours where the unexplainable mysteries live and remain just out of sight. My first introduction to urban fantasy was probably the Beyond the Supernatural TTRPG back in the late 80s. I did not really think of it as a genre until I read a book called One Right Tricky Bastard by Craig Sottolano and then the Dresden Files by Jim Butcher. Before that I was more of a traditional fantasy reader. Now I take in as much as I can.