There are more $20s in your wallet than $10s, $5s or $1s combined. 
You wish Costo sold condoms.
Oil & Lube shop signs catch your eye for the wrong reason. 
You hear "Internet Service Provider" and think, "Yes?"
Seeing a shop called 'Hobby World' next to a 'Condom Sense' makes you literally LMAO. 
Pinapples make you grin. 
Seeing someone you recognize makes you wanna head in the opposite direction. 
Sitting alone at a bar isn't the least bit uncomfortable. 
Acronymns are more for safety than convenience. 
Having your rent due and no money is no cause for panic. 
Hope this ends up being a FUN thread of idiosycncrasies from both sides of the fence! I started with a few from the provider standpoint. Please pile on everyone!