Well, I'm relatively new for SR (2-3 years by now). I know only 3e and 5e. I prefer 5e, though 3e fluff is cool and a lot of things are just adorably retro in-setting. However, it's just so full of unnecessarily complex and weird rules. Maybe it's because I'm coming from WoD, but 5e felt a lot more intuitive and logical for me, albeit the ammount of rules could be a bit daunting.
As feeling goes, 3e has the feel of the '90s, which I like, but 5e is not that different, IMO, at least it felt pretty much the same setting for me. I suspect that's why staunch 4e fans are suspect to call it "nostalgia for nostalgia's sake", because it went back to how things were portrayed earlier and they liked the 4e portrayal more, as I think, based on what I gleaned from discussion, that was the most different-feeling of the editions. Based on the few fluff books I've read from 4e, I like 5e better.
Anarchy is not my cup of tea, I'm not a fan of rules-light narrative games like that in general.
6e, we will see, I don't want to jinx it, I still feel the burn from Vampire 5e, which was a huge disappointment for me, absolutely not the game and setting I loved, so I hope SR 6 won't be like that. Based on the info so far, I1m cautiously optimistic.