Yea, that unspoken interaction between two equal players "playin" off each others ideas is a real high. If you haven't been there, you won't understand.
If you have, you'll NEVER be happy with plying with tracks of ANY kind.
Russ
Russ that's all well and good... I Know the feeling well....
BUT when your alone you gotta do what you gotta do.....
"Have Tracks Will Travel" 
just sayin'