For us earlier on, the search for new sounds was part of it, but the nub was to find material that could prove useful to improvising. If you like; to find an essence or core to a way of playing music. I did try various things with the electric guitar (preparations, feedback etc. and always trying to avoid the ‘I’ve got a new device mentality) but I quite consciously moved to the acoustic instrument to get closer to what being a guitarist meant.
Another point is that the instrument has very little sustain and the timbral range is also fairly limited so whereas someone on a different instrument might employ sustain and a shifting texture I have to work that much harder. The, if you like, ‘melodic’ or ‘lead’ part is in there, but I often disguise this by changing reference points, so it can seem like it’s just a bunch of notes to some people.
It just came about from letting the music come first. I think that if people want to turn things into movements, directions etc. that comes later and is for them. I personally don’t find that productive.