About half the time I go solo. The rest is divided between playing in a duet or in a band. I use the Tyros 2 with all three, but I also use softsynths for the band work and sometimes for solo guitar emulation ala "Real Guitar".

I don't use very many midi files but I also have no problem using them if I feel the need to. As time has passed I've gotten more comfortable singing and playing solo, and I'd say I probably do "unplugged" versions of songs as much ( and sometimes more ) as 50% of the time, depending on the type of venue.

On the very simple stuff where I can... I sometimes use my guitars w/o backing, and on the more difficult pieces I use either the T2 voices ( solo piano or guitar sounds ) or Real Guitar, along with minimum of arranger backing ( often none at all ). I love the types of venues that I can do mostly acoustic stuff... I feel a much closer connection to the audience when I play "unplugged".. just me and the instrument, and by the responses I usually get I've come realize that this connection works for me, actually makes me feel more comfortable ( it used to scare the heck outta me goin' "nekkid" ), and therefore more entertaining.. occasional flubs and all... humor has also become a great ally for me.

AJ