I agree with GUEST 03.54. Most singers and musicians want to put across to listeners the import of a particular piece, or, if there is no audience, just to enjoy making the music.

Show offs are saying "look at me". I have personally known a couple of 'musicians', both of whom played the mandolin, who would effectively overplay the rest of a group of musicians or almost drown out a singer with their 'fancy' playing. One was actually a very good musician but was still too loud. The other thought he was a good musician, but was much too f*****g for the standard of his playing!