I also use nails in my right-hand technique, but probably differently than you guys. Because I have a more aggressive style of playing, I use my nails to get less of a "fat" tone and more of an attack sound -- almost pick-like, I guess. This is really hard on my natural nails, so I have artificial nails put on my first and second fingers. I also have one on my thumb, but that is to protect the top of my thumbnail because I do a lot of strumming. Although I have given up the ability to produce a thicker, bassier tone, I find that using my nails can produce a pleasing bright sound, either on my Rickenbacker or on my acoustic bass guitar, which can be unique and interesting.
I have played like this for at least 10 years, and have a hard time playing with just my fingertips now. This can be a burden in the event that a nail comes off during a performance, but so far I've been lucky!!
