I use left-hand sounds a lot ... the sound depends on the song. For songs with a strong rhythm or beat, I use a piano or jazz guitar or something like that. For softer/gentler songs, I use strings or a pad synth. I tend to play the left hand fairly actively for some songs, doing runs, fills or 'passing-tone' kinds of things, or adding some rhythm such as what a rhythm guitarist might, or such as a pianist 'comping' might do. I try to make sure I'm not competing with the vocal lines, saving these 'runs' for in between vocal lines... it just depends on the song.

I also mute one or several of the built-in sounds within the style, to leave more room for the playing that I describe above (so it doesn't get too busy). This way I am sort of injecting more of "me" into what I'm playing . . .

Jim