I can always tell when I get a call from someone in the U.S. military.  They've planned the call, so they get right to the point without humming and hawing or getting off onto irrelevant tangents.  They're always lucid, and communicate easily.  They know and use the standard phonetic alphabet (really important with a bad cellular connection):

Alpha
bravo
Charlie
Delta
Echo
Foxtrot
Golf
Hotel
India
Juliette
Kilo
Lima
Mike
November
Oscar
Papa
Quebec
Romeo
Sierra
Tango
Uniform
Victor
Whiskey
X-ray
Yankee
Zulu

(Memorize these.  There are only 26 of them and they can save you from communication errors over and over)

Plus they're always patient and respectful.  No exceptions.

Now, shall we talk about your average college student?  No thanks-- I'm in a good mood and don't want to spoil it.