well, here's my experience:
I started H&H on the "end" of world 7 (when ppl already could hand bash palisades with bare hands alone and such things), and it amazed me on the possibilities this game offers. I'm a UO fan, but always felt UO could have something "more"... and I found this on H&H. On world 7, I really didn't got to much evolved, because I'm always at a low peace when it comes to "lvling". I think I reached something arround 100 explo, 50 survival, 100 MM, never had mining, never used metal, just had a small farm somewhere. But 90% of the players I found where friendly, or at least "neutral" on not attacking me on sight!
On hafen, I started some weeks ago, but haven't played enough yet (I still have 30+ hours free play time from the initial 48 hours

). I'm strugling to evolve since the best curios I could find are dragonflies with 10q, but that's ok. Today I was wandering, searching for anything to get LP. As it was in world 7, everyone I found was friendly to me untill now. I got chased down by someone with a sword and high q armor... when u'r wearing nettle pants and shirt, nettle BP, and someone start to chase you saying stop, but already on fight mode, what's ur first reaction? RUN TO THE HILLS! So, he caught me up, downed me, but didn't kill me (and I'm thankfull for that, and I'm not saying his name here). After a brief explanation, he told me he was trying to find who killed his friend, add me as a kin, and just left me free to go.
One thing anyone joining this game must have in mind: this is open pvp, ffa survival game. There'll be ppl trying to kill you! But at least, most ppl here are nice!
I tried another survival game from steam sometime ago, and THAT was chaos! You would build a house, leave the game to sleep, come back later to find out your house trashed and a gang of players waiting to kill you just for the fun of it! Most players didn't even wanted to really play the survival part of the game, their interest was on killing everyone and that's it. At least in haven, those are somewhat rare (or I'm luck enough not to find them

), and most players will not just kill you on sight if you'r not a problem for them!
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Forget everything above... just found out that wretched gore is impossible to heal, so, the character I created september 9 and got downed today is now useless, and I don't think I'll have the patience to make another one from scratch =/