I'll try to make it short and clear, feel free to ask question, comment, like or hate! Ernie Ball Extra Slinky 40-60-70-95: weirdly enough, the E string is still bright, the other ones sound aged/dead/dull (as you prefer), and I can't explain why. Because usually, the E string gets dull first... maybe the gauge? These strings are confortable on the fingers, their brightness goes away very quick after a few weeks, and they are nice for some vintage tone D'addario EXL 45-65-85-105: yeah, very common, okay on the fingers, good tone when brand new, but E string gets dull and then I found them boring... They're cheap, and they have nothing special, a lot of bad sets too! D'addario ProSteels 45-105: worst strings I've tested: very rough on the fingers, can't slap without burning your fingers, high tension bends your necks, not much more brightness than other sets: avoid them Elixir Stainless Steel 45-65-85-105: tension is a little high for my taste, but on the fingers they are... awesome, Elixir coating is the best if you have a thin layer of skin on your fingers, very good for playing with a pick though Elixir Nickel 40-60-75-95: my favourite roundwounds ever, awesome tone, low tension and high playability, bright, last forever, the best on the fingers for both of your hands, golden end-balls, no silk, what else? Fender Stainless Steel Flatwounds 55-105: I was cheap and hoped they'll give me the Steve Harris tone on a P: very wrong, these require a U shaped neck or you'll bend it, unless you wanna max out your trussrod, tonewise they're okay, but at least they're very soft to the fingertips LaBella Black Nylon 750N 50-105: the lighter gauge of the two offered by LaBella for black tapewounds strings... to me the best flatwounds I had in hands! classic funk / jazzy tone, with lots of thumping if your action is set as it should; in the middle for me... they are letting a lot of expression from the wood, mostly your fingerboard, these don't require a new nut, on the contrary to the 760N (60-110), the tension is super low but once you get used to it, they're perfect, just a bit slippery, but perfect! very underrated, unknown flatwounds/tapewounds in my entourage GHS Precision Flats 45-95: they're okay, not awesome but at least they are fast to "break in", tension is a bit high, but playable, their purple silk is pretty but loosy, if you want Flea's tone from Stadium Arcadium, you're gonna have to use them a lot before they'll reach the wanted tone! Thomastik Jazz Flats 43-56-70-100: overrated strings IMHO, and I know a lot of people are gonna want to sue me for that: they require months to break in, and then, even after that, the A string is not balanced with the rest of the strings, it just jumps too much and you have to play it calmly, you can't attack it, I tried to like them, but to me the price was not justified... maybe the ones who like are lucky enough to be older which could be made differently? I was excited every time I was watching a video of someone playing the bass with these strings... I could recognize them without seeing the silk or anything! And I got them, and I was disappointed. My 46 cents!