I use Rotosound Swingbass 66 standard one.
I bought a pair of La Bella flats one time. I have no idea how some of the people here on this site can play fast with these style of strings, they SOUND AMAZING, But feels like im playing with smooth steel cables. So freaking thick. I had to take them out.
I hate how Roundwound strings get so stinky. How long do they actually last you guys? I have had mine on for about 5 months... I don't really notice the strings going "dead" yet, or at least my ear can't tell the difference
I'm probably not the best person to ask about that since I've been guilty of leaving strings on an instrument for 5 years. I'm a lot better these days, though.
I find with the flats, especially the Rotosounds, if you use a lighter gauge with those, it's a lot easier and more flexability. I know what you mean about the cable feeling.