It is just a statement that says. I really like riding my motorcycle. I would rather be riding my motorcycle. And if the sticker is on the motorcycle - Then you are saying this is what I want to be doing. Back off, I am on my motorcycle. At least in my Opinion.
Philosophically it can mean what you want it to mean. If someone ask me what it means I either give them an ADVRider salute, start singing, or just give them a head nod. Sometimes, I just give the bike full throttle, and they figure it out.
As far as Harley riders, Your Mileage may vary.
Thanks to all who have ordered. Your replies and responses have been very enjoyably.