Isn't this whole question a bit of an impossible (and arguably slightly pointless) one?

I mean, yes, obviously "prissy" anything is bad. I can't think of any kind of situation where any musician would want anything they played to be prissy, unless it was for satirical purposes. But there are plenty of situations where you would want to pick delicately, or sparsely, or softly.

A delicate ballad is obviously not going to gain anything from someone pinging the strings hard (a la Bert Jansch) and putting in 10 notes per second.

Hell, any kind of fingerpicking would be a nice bonus at the London acoustic singer-songwriter gigs I go to. it's normally just strumming of the most banal and unryhthmic kind.