If you want to PvP most of the time, head for dark or anarchic systems to fill your boots. If you are a PvP hater, then avoiding lawless systems shouldn't be too much of an issue and core systems are probably weighted against it as well.
Trouble is, while I don't want to ever be subjected to non-consensual PvP, I want the hardest PvE challenges the game can throw at me. I don't want to stay in kiddie space where NPC police protect me from both the player pirates and the "scary" NPC pirates, I want to go places where I will be constantly fighting for my (virtual) life, but only against NPCs.
Thus, a system that segregates PvP and PvE zones based on difficulty is completely worthless for me. For me, at least, it leads to the PvE half of the game being too boring, and the places where the PvE could actually be challenging and fun being infested with PvP, which means I'm not willing to ever go there.
I think we need to put it into perspective. Even if I'm a PvP hater and get killed by a player, it's not exactly the end of the world. Just learn from it and be smarter next time...
It's not the end of the world. It just ruins all the fun I could have had that day, thus making the game completely worthless for me as entertainment, not worth wasting my time with at all.
(There is an exception, though. If being killed in PvP has little to no negative consequences I just suicide when attacked, respawn, and continue playing as if nothing had happened; in this way I can play games like the plethora WoW clones out there even on their PvP servers, simply because I can just ignore PvP fights and keep playing as if nothing had happened. Interestingly enough I tend to not get attacked twice by the same person, perhaps because killing a target dummy with a player tag is not fun.)