Apparently 121.X freqs mean you can drop off the whole first three digits; I remember being told "Contact ground point niner" all the time flying out of Pensacola Regional.
Pretty standard at a bunch of places I've flown, both military or civilian. As was mentioned, 121. and 7, 8, 9 are common freqs for ground.
My pet peeve is to be on approach in IMC being vectored for a final turn on to the ILS when someone comes on freq and delivers the Gettysburg Address while the loc is coming alive and the controller can't get a word in to give me the final intercept heading and clear me for the approach.
A common thing that happens here, especially when I'm flying w/out a student and therefore shooting the approach at 199.9 knots. ATC isn't used to seeing the extra 80 knots around Whiting, so it sometimes throws them for a loop. That's about the time when one of our Italian/Spanish/Indian allies on a Fam 4 decide to key the mic.
For those in the PNS TRACON, have you enjoyed the new guy? He's learning, but it's fun to hear the supervisor behind him playing ventriloquist in order to get out what needs to be said. The other day I heard one of the regular controllers say, "Switch 127.35 and say hey to the rookie."
