Right now I am playing 45-105 DR Sunbeams on my standard tuning basses, and about to use some DR Pure Blues on my piccolo tuned basses, .18-50. I ordered the piccolo custom sets from Fret Nation and would’ve just used Sunbeams but they don’t make a 50 in the SBs.
I would be happy playing XLs or Slinkies also. I had been playing flats for a while, but recently started getting into pedals and some other techniques like slap that to me just sounds better with rounds. With the pedals I am using subtle tonal differences between brands are less of an issue and it becomes more about feel, longevity etc.
So, really, my preferences are nickel plated steel, medium-ish gauge and no silks. I have an irrational dislike for silks. I just don’t like how they look and age, especially if you have to take strings on and off.