To put a new spin on a beaten horse, what is it about flats you prefer over rounds and what genre of music do you typically play that they work well for? For example: I play rounds. I play in a reggae/punk/rock band and a few cover bands. I like to use a lot of effects (specifically OD, but also chorus, envelope filter, delay, yada yada). I like the high frequency response of rounds to drive those effects. I've found that I prefer rounds over flats for this reason. What about you? What is it that flats do for you that you prefer over rounds. To clarify, there is nothing wrong wth using either string, they are both useful. No factions or over reactions, just anecdotes. No need to quarrel!