You know. Fitted four different nuts to my Precision Bass not because I wanted to but looking for that sound you know the very elusive sound we all try and find . Brass , Bone , Graphite, and Tusq . The best one for my bass was the tusq . One of my other bases I started this time with tusq this time the bone sounded better . I personally believe it's down to the body and neck wood .just use the best nut material that suits the guitar your currently working on . And do try more than one i think you'll be surprised . Some of the best Antique Gibson Les Pauls revered because of there tone have Nylon nuts on. So I guess as I say use what's best for your guitar.