IMHE they do make different noises....
Normally I get a happy little "buk, buk, buk" noise when I go to see them, which I think is really sweet (but with 4 spoilt pet chooks I might be a little biased ;D)
When they've laid an egg, mine are more noisy for a minute or two afterwards. Which goes more like "buk, buk, buk BURGHKAAAAA!!" And one of mine likes to do this before she lays an egg too ::)
Mine are also much more noisy if they are worried, more like an alarm call, eg when there was a cat sitting on the fence trying to decide if they were fair game for dinner, or if the safer option was to run away!! This went more like "BURGHK, BURGHK, BURGHK" (with all 4 chickens trying to look as big as poss and out-staring the cat!!)
And
mine do try to train me to give them nicer food by kicking up a fuss about 3pm. Its a battle of wills, which we both like to think we're winning :P
Mine would also kick up a fuss to be let out when its light and the sun comes up. But I've found blackout lining over the windows of the shed they sleep in fools them into thinking its still sleepy time ;)
Do you have a particular problem that you are battling with - maybe if you give some more details it would be easier to suggest something that might help?