What is the most and least you give to someone with their hand out?

And why?

Is it strictly based on the amount of loose change you happen to have? Is it how they look or seem to you?

Have you given paper money?

I ask because I recently came across someone whose “cry out” moved me (what he said isn’t relevant – it was the way he said it) to take out my wallet and give a lot more than I normally give – as you know, sadly, there can be too many of them to give everyone all the time.