I often play ambient music for around 30 to 40 minutes via my guitar, and several effects units.
This has NO restrictions.
Play anything to your hearts content.
No matter what it is bad or good, experienced or simple.
Just shove out my emotions in a musical form untill im sweating and feel amazing.
This may sound odd to most but does anyone else Guitar meditate?
l shall post an audio sample for those who wonder what such is.