I'd be interested in what other people might have to contribute to this.
Am I the only one who:
Kind of wants to throw my empty water bottle onto the road shoulder like they do in races like the TDF? Just because it looks cool.
Listens to Celtic / Irish music while riding? Something about the solitary road time with the sound of bagpipes, uelliann pipes, and/or violin playing puts me in a warrior mindset.
A few times a day poke, pinch, or squeeze what used to be pudding but are now amazingly hard quads and/or glutes and/or other leg muscle and think, "Wow, I didn't know I had these.... awesome."
Take things out of my pockets, make sure I haven't eaten yet, do it in the morning, and whatever else to make my weigh-in at my absolute lightest for the day. I weigh in at work, so I don't do it naked... but that's not entirely off the table.
Pulled the squirter open on my water bottle with my teeth a little too hard and popped the "pop-top" style cap off, emptying my red gatorade all over my white sport shirt. (Happened last night with a bottle that I had just bought.)
That's about all I can think of right now. I'm curious about other people's odd thoughts and behaviors to know that I'm not alone in my weirdness.