I think that even if you're equally skilled with fingers and a pick, some lines will still be easier or feel more natural with one or the other. And there's the difference in sound.
I find that I need to shorten my strap to play comfortably with a pick, so for me it's all fingers all the time.
I find that I need to shorten my strap to play comfortably with a pick, so for me it's all fingers all the time.