I use DR Sunbeams for round wounds. I love how they sound, but they feel super annoying until they wear in a bit. I use Ernie Ball Group strings for flats and they are disturbingly smooth in comparison!
why hate it :) I love flats on bass and guitar, and also there is more of that tone than people think in roundwounds on guitars like say a gibson mid sixties parlor, or a more recent archbacked guild... there is a cello-y quality in the high frets of the low strings that just goes into extra yummy with flatwounds. my dumb opinions :)
I prefer the D'addario NYXLs, but had to get a set of DRs on short notice and they tore my fingers up. That's a good thing though, I needed some callous building, but they were grippy to a weird degree. All of my fingerpicked notes were late. So I swapped out for NYXLs after a couple rehearsals and they were SUPER slinky in comparison. Same gauge, just more flexible somehow. The DRs do sound great though, just not for very long.
I've never been a fan of DRs either, but I'm pretty sure I've only tried their Rounds. For flats I've usually used LaBellas or D'Addario, may have to give these a go next time I need new flats in (checks calendar) roughly a decade from now.