Whether someone uses charts or not makes no difference to the music...listen to a concert pianist who uses the music, it is still just as passionate as that played by another without the music.
What I think is detrimental and "clogs" emotion and interaction are those who play and TOTALLY focus on either the keys or strings of the instrument, even when they do not use charts.
I play with barely a glance at the keyboard, most of the time I am looking at the audience, with quick "refreshing" looks at a chart, more for pointers to the next set of 8 or so bars...
Dennis
[This message has been edited by miden (edited 11-07-2010).]