There's a line in a Newgrass Revival song (Souvenier Bottles ) that goes: “Remember last night and four men standing there, Makin something out of nothing, Makin music out of air”
This pretty much says it all for any artist and is even more meaningful when a TEAM of performers can accomplish the creation. As the line goes, the WHOLE is GREATER than the sum of the parts.
A performer can't pinpoint the true depth of their satisfaction or the true source of their joy as it covers too many dimensions of his or her being….and it feeeeeeels good!
When the creation, intepretation and presentation is appreciated and impactful to the audience, then it's GREAT! Go create something!