Sorry, I was just using you as an example to show that you do get used to how much food your cat needs - if you have a cat that is consistently not eating everything, then you are putting too much down, so personally I would be adjusting what I put down, I dont like wasting food on a regular basis, but that is just me.
Lynn - take it you dont follow the rule about wet food should only be down for a certain time? How long do you think is OK for it to be left, I have had cats in teh past who would prefer the food I put down at brekkie at teatime, but everythign I have read said I shouldn't do that?