I'm an old MxO player that's just now come back. Since I don't have access to my original account, I just have access to a couple of low level guys I think I messed with at one time.
In any case, I'm either going Recursion or Vector. I love to roleplay. I love events (official or player hosted). And I like PvP in that it makes it interesting watching your own back.
However, I want to hear from those of you in the middle of it. Where do I belong? More than likely I'll go Merv since that's what I've always been. I'm unfamiliar with the new factions. I wouldn't mind a lil info about those. All I really want is a great community experience with exciting play. Last thing I want is to just stand around being bored, with missions being the only thing to do. That's why roleplaying and events are a must. And of course PvP is great if it's worth it.
Gimmie some insight! 
