I never say anything unnecessary on initial call because I have no idea how busy they are, having just tuned in. They might even be in the middle of a mayday situation.
After having been on the freq for some minutes I have a better idea of how busy, and if not busy, I might become more verbose, especially when leaving.
Where I fly, it can be quite busy, so the minimal initial call often immediately results in a "XX-XXX Standby", but then again they NEVER forget you, always come back in a minute or so.
BTW, powdermonkey, isn't "Dublin Good Morning/.Afternoon/Evening, EIXXX" poor RT ? Shouldn't Dublin's full callsign be used in an initial call, and shouldn't the niceties go at the end ?