I always take pictures and toss them in the file to prove I was actually there to re-inspect... I only provide a picture with the CIR if its relevant.
As Ken said only for items that are relevant where you would want to evidence their repair. If you are returning to make sure the water and electric is on, I wouldn't bother with photos of the faucet running.
Does FHA require photos to go along with the CIR? I'm sure it is generally good practice to include them but I was wondering if they are actually required?