Lack of feeling" is a whole body-mind-emotion thing. I can't imaging someone singing with feeling and playing without it, or vice versa (?). If you understand a song and sing it with feeling, I don't see how your accompaniment can help but follow.

Now maybe this sounds like I'm contradicting what I just said, but I can imagine someone playing a complex accompaniment they're proud of with a lot verve and enthusiasm while giving the song itself short shrift. There are a number of folk singers around who put all their attention on their guitar accompaniments and seem to regard the song was merely something they have to do to justify their guitar work. In short, the song accompanies the guitar rather than the other way around.

I still don't get "prissy."

Don Firth