"Fully" anything. Meaningless bollix. You either are or you aren't. No fully or partially involved. Ever.
"Filthy 1234, are you ready?". "No, waiting on the cabin" AAAAARGGGHHHH!!!!! What's wrong with the correct "Negative"? What kind of idiotic gloop-speak is "waiting on the cabin"? Are you serving the cabin tea? Do cabins even drink tea? Just "Waiting for the cabin" would be bad enough, but on it?
Telling the fella your heading after he's told you to maintain it, he'll ask "and report it" if he wants to know.
Asking closed-loop questions " Confirm cleared FLXXX" Instead of "Confirm cleared level" Basic Human factors stuff.
Hitting the ident after departure "because they always ask for it"
Briefing taxi routes and parking positions before you've recieved them,or when there is only one way possible (a particular bugbear in my company). What, are you psychic or something? Why/how can you just assume that? Or why waste breath briefing the self-evident?
Spouting a great unasked-for frequency-blocking spiel on contacting Approach reporting type, variant, heading, speed, altitude, ATIS ident and QNH everywhere you go just because the unique procedure at home base seems to need this, yet not noticing that it doesn't happen elsewhere cos it isn't necessary or wanted.
Spouting unnecessary detail about minor tech problems that can only result in overreaction by those who aren't allowed the discretion to disregard such details.
Spouting details of non-critical tech problems on "company". Manna for the media maggots.
"Repeat" for "say again".
ie, just not engaging brain before using the radio.