So I'm getting a fretless, sooner or later, and I will be using rounds most of the time. I typically use Rotosound Swing Bass 66 stainless steels, but I'm wondering if it might be a better idea to use nickel/NPS instead. Not in terms of board wear, but just in terms of sound. I use steels because nickels get too dull for me as they age, and steels sound good to me any time after those incredibly zingy first couple of days. But maybe the deader sound of worn in nickels will sound nice on fretless, sort of flat-ish. Although maybe I will still want the steels on there. Just like my fretted bass, but without frets. Either way, I'll probably try them both out once I have the fretless, but I'm interested to hear different opinions on this. what kind of rounds do you use on both fretted and fretless bass, and why?