"Returning" Beta player player here, though I don't know if anyone remembers me. Col.Kernel then, and Col. Kernel now.
Too many rapid changes in the crafting system caused me to take a break to wait for it to stabilize a bit, then RL kept me away. Been thinking about loading it up and checking it out again, and got the email telling me "It's dead, Jim". Signed the petition and I'm here for the original vision (SciFi, not WWII).
Searching my email for Firefall it looks like my join date was 5 Dec 12.
I love the concept of gaining XP, then spending it to either learn an upgrade frame or learn a completely new frame. I loved the customizability of the crafting system as well as (IIRC) the ability to mount different weapons/devices on the frame's hardpoints.
Glad I got the email through the (presumably) now defunct Firefall forums to come check this out. Firefall was the first FPS/TPS I ever really enjoyed. The ability to progress without having to grind levels was a nice feature IMO.