My top pet hate: flight crew who just talk to much on the R/T, e.g.
"Control, sorry to be a pain, but would it be possible for you to..." 
When they should transmit
"Control, xxx request..." 
Do they really think that by being obsequious they will have their way? The ATCO will try to accomodate their request if he/she
can. Whatever happened to standard R/T?
Cheers
