For my money, if I'm playing anything then it has to have some sharp angles on it. It's got to have some edges that you can cut yourself on, otherwise it's boring.
For any writer, the ability to look at a sentence and see what's superfluous, what can be altered, revised, expanded, and, especially, cut, is essential. It's satisfying to see that sentence shrink, snap into place, and ultimately emerge in a more polished form: clear, economical, sharp.
My dad was into the 1950s doo-wop era. If you look at those groups, or at James Brown, Jackie Wilson and the Temptations in the 1960s, you'll see you had to be sharp onstage.