Originally Posted by Pichy
Reduce finger noise?
Without reading any other responses, here's my pure 2 cents. I use rounds and flats on different basses and I switch depending on what I'm playing. I use Regular Light Gauge D'Addario ProSteels for rounds because they're awesome (extremely-bright, punchy, metallic). I use Regular Light Gauge D'Addario Chromes for flatwounds.
1. For Rock, I would use rounds to help cut through the mix.
2. For "Pop", I would use rounds...to help cut through the mix...? (I don't really play Pop...)
3. For Jazz, I would use flats. They give you a warmer tone. That's assuming you're playing fingerstyle. For slap, I would probably go with rounds.
4. Flats will reduce finger noise.
5. Flats are easier on your fingers.
6. Flats will last much longer than rounds.
With all that being said, I prefer rounds to flats because I don't often want to go for the mellower, warmer tone that flats have as compared to rounds. You can't get further from that than D'Addario ProSteels, which, again, are my go-to roundwounds. Ultimately, the decision should come down to the what you need for the song, which is something you should determine for yourself.