I haven't skateboarded in more than a decade, but I've noticed that if I walk by a good looking handrail or concrete ledge, my brain still automatically starts picturing 50/50 grinds, different tail-slide combinations, and more. I didn't play football in high school, but I have to imagine it is something similar that continues on.
I skated for most of my youth and have the same thing going on. I was very happy when someone from my area won SOTY also. I don't really see the same magnitude of fandom during SLS ever occuring. Sometimes people really hate Nyjah or really fan boy for Joslin. Maybe we'll see regional skateboarding teams in the future, but for now we can enjoy skateboarding purely being about the talent. The Olympics will definitely test the waters for this.
There was a time when I was downright obsessed with co-op armed robbery video game Payday 2, and even months after I stopped playing, I could hardly enter a bank lobby or art gallery without starting to "case the joint".