I am curious as to what rounds those folks who fancy themselves as predominantly flatwound users like? I love LaBella and TI flats but have had my roundwound world turned out.... I have been a recent D'Addario Nickel XL convert in the past few years and I used to like DR's. I am looking for more fundamental pitch, less zing yet I really must have a very flexible string for my carpal tunnel and neuropathy.
And, sometimes they give me the sound I want from that bass, so there they stay. But usually they're just a known starting point to begin my search for "That Sound". The only other rounds I use (if you don't count Tapes as rounds) are the short scale GHS Bass Boomers. On my Kramer Duke Special, they most definitely give me "That Sound"....