I have a wonderful ESP P-Bass from the lawsuit era. It has had the same strings on it from when I bought it used about 18 years ago. They are round wound. When I use the bass going into my DAW I can get tones that I like just by turning the bass's tone knob back pretty far. On the other hand, I've heard that flat wounds are the way to go for a classic, thumping bass sound. I'm usually looking for classic funk bass tones-- not Stanley Clarke leads, but instead just strong, percussive rhythm parts. Most likely I'll just keep these strings on until one breaks (which may be never), but looking for your thoughts on whether I should switch to flat wounds when the time comes to change strings. Part of the reason that I've never had to change strings is if you add up all the time I've played it in the last 18 years it probably totals less than 20 hours....usually just picking it up for 10 or 15 minutes to lay down a quick bass line track into my DAW. I covered bass on one gig so got a few hours on it in just one night.