I play with 2 fingers, I've become obsessed with having the length of my index, and middle fingernails exactly right. It's not about hitting the strings with my fingernails, it's more about having the nails right, so the pads on both fingers sound the same. I play live every week, and before leaving the house, I trim them both the same (real short). I don't do that for practice sessions, but, it matters for live performance to me. If I don't do that, I have to make a conscious effort to get a consistent sound.