You know you shoot too many photos when...

[Lionheart]

1. They know you by name at the photo finishers
2. People wonder what's wrong when you don't have a camera with you

add in your own...

you feel naked without a camera hanging around your neck

[SmartWombat]

Too many photos ...
When you have to buy two more drives to store the images from 2005.
When your desktop system has more than a terabyte of storage.
Then I guess you might have shot enough.

[Skyman]

You know you take to many photos when...

the photo lab uses your negs to calibrate their machine
your favourite lab asks if anything is wrong when you go somewhere else
you go out on a nightime shoot and spend 2hours taking photos for the toursists
you are amazed that another photographer doesn't know how to....(insert technical line)
you never got over the how big is your lens syndrome.