Nails, and I'm not the type of person to have long nails at all, not do I have strong fingernails - mine are thin and brittle. They don't have to be especially long - just long enough! I keep my right hand nails just long enough to peek out over my fingertips, which doesn't take a lot of maintenance at all - maybe five minutes a week of filing. I keep my left hand nails trimmed as short as possible.
I grew out my nails again 2.5 yrs ago (after many years of having them clipped to the quick).
I am similar to JaneRay here.
However I try to keep my nails about 2mm past the fingertip as it helps with better articulation in both strumming and fingerpicking.
Occasionally I've had a nail split or chip and had to cut or file it down and wait for it to grow back to the length required (about 3 weeks).
This is a real PITA as so much of my technique is now dependent upon my nails, as I really am crippled without even one of them and have to wait for it to grow back.
I detest ALL fingerpicks, for playing with them is too far removed from actual contact with the instrument, I might as well be playing with a prosthetic hand.
Also, I refuse to superglue fake nails or similar in the event of losing a nail (because reasons).
The main takeaway for me, as per what JaneRay has said above, and with my own experience is if you keep them short and keep the edges smooth, they will last a long time, and requires very LITTLE actual maintenance, and the payoff compared to playing with only your fleshy finger pads is HUGE in terms of increased dynamic range, articulation and control.
However, plenty of folks play
without nails too, so to each his/her own....:music: