Then you you get told some nights that your playing is great ( and it's usually the night you have turned off and just let things flow without too much concentration), and wonder what the fuss is all about, but it does give you a lift being told and a good feeling that you have lifted others so must be on the right track?
Had a frail old man from come see one night after a gig when i was packing up, and told me " i really enjoyed your percussion young man".
Things like that give you a buzz.
Same applies for encouraging another muso, give credit where due (especially if you are in a band), be generous with helping others if you think suited.