I know exactly what you mean man. I play synth and piano at uni when i'm jamming with my high mates and swear I utterly peak when i'm really blazed. It's the best feeling ever and I do play better too because I record every jam and listen back to it the next day.

I play drums at a friends too when i'm at home and find I also get better rhythms when i'm blazed. Music man, it's just the best thing !