Thankfully i got into Supernatural super late and I really only watched it because I heard it had Satan and demons and I wanted to get in on that. Lucifer (Mark Pellegrino) and Crowley (Mark Sheppard) were be absolute fun to watch, and I really enjoyed Season 5 (originally the "final" season).
The Supernatural fandom is a force to behold, I'll say that much, and believe it or not, there are portions of the fandom that are embarrassed by how they acted as a group a few years ago and want to put that behind them. From my personal experience I am friends with fans who are older women that enjoy the show because the actors are sexy. They don't ship the actors with each other or do slash, but have fun squealing over how handsome they are and genuinely praising them for entertaining them for so many years, same as how women go for Channing Tatum or George Clooney or Hugh Jackman.