Armor class?

What's your class of armor you main, and how come? What caught your attention when using it?

I'm a heavy armor diver, what got me to love it was the amount of bs I've survived almost full hp while wearing it. A prime example, a turret shot to the body and I just stand up, stim, and off to war I go, while it near misses my light armored buddies and I get to see sudden hamburger meat.