16 is just right. On other servers, you get the feeling: Yeah, they are the enemy's, but they can't harm me *Moon*. On Vector, you actually learn who's the enemy, and at level 16, you feel relief when you meet other Machines.
I'm actually wondering about this too. I'm an returning player (It's patching at the moment) and i was wondering if a Hostile Server would be the way to go? I want to do quests, get to 50, and so on, but i also want to PvP. Any ideas on wi...