I started out bass using roundwounds but I changed to flats due to curiosity. After months of playing, I came to the conclusion that I like the feel of flats but the tone seems to lack clarity and brightness. I also felt that it was hard to play fast lines with the extra tension. Today, I decided to change back to rounds and I can't believe how much I've missed them. The brightness and the decreased tension is like heaven on my fingers. I feel like my bass is brand new!