EQ was the first 3D MMO.
UO was fantastic for its mix of PvE and PvP. For a time, you could be a player who preferred PvE but you could still protect yourself against PvP. I remember mining in rags, when underneath I was a fully maxed armed plate wearing mage ready to pounce on any unsuspecting griefers.
EQ took a different route, it emphasized PvE. PvP servers were considered broken.
There were endless discussions in gaming forums lamenting this lack of "forced but fun" PvP in EQ which was present in UO.
However, EQ proved to be more influential, the big successes that followed like WoW emphasized PvE and the care-bear factor.
Those games that tried to bring some sort of forced PvP onto users failed.(I am not sure where EVE falls in this regard)
Disclaimer: I played both UO(1998-2000) and EQ(2000-2006) and my bots still play EQ.