What I've noticed is that "ear" pianists usually have a very simple left hand, probably just vamping two block chords, which is perfectly adequate for accompanying your friends singing. Whereas most written piano music has bass patterns usually consisting of single notes, and is to me the most difficult part of playing piano.

So my question would be, OK, I can understand you playing the treble clef melody by ear, but how do you go about putting a suitable left hand to it?

Cheers, Terry