Remember the type of people who you are flying at. Depending on the area, different signs might be called for.
All in all. Wal-marts are just hands down the best. The type of people that shop there are the type of people that will help you out.
Only losers shop at Kmart. I wouldnt want their money anyhow
Mid afternoon is usually best for me as far as percentage of cars giving money. But I usually make the most during rush hour just because of the volume of vehicles.
I say let people stereotype people with signs. I could care less about their opinions. The type of people who get a bad taste in their mouth from a bum holding a sign aren't going to give ANY hitchhiker a ride. Even if it is a dude in a 3,000 dollar suit who just needs to get to work.