Wally, I suppose the people's key depends on the people and the music being played. In my case (mostly celtic dance music), G and D (1 or 2 sharps if the music is written down) are by far the most popular and in many cases to play something out of those keys could be considered either to be showing off or being unsociable.

If you were playing with some brass players, I don't think that they would thank you for E. As far as I understand it some of these instruments natural keys are Bb and Eb so E with give them the equivalent of rather a lot of sharps...

Jon