As some have said, it really depends on your role play (assuming you want to actually role play?)
I never use Power Armor, and never will. Never use heavy armor at all, even in Oblivion or Morrowind (except for training the skill). Ugly, bulky stuff - ick!
As a nature spirit, I stress speed, agility, and flexibility. "They never knew what hit them" is a good motto my characters take to heart very seriously. They also embrace the need to look terrific and demonstrating both great caring and great vengeance, whichever is called for by the context.
I focus on energy rather than physical projectiles (electromagnetic energy rather than kinetic energy, if you will). The "Raising Heart" magical staff mod makes a Gatling Laser look wimpy, but I try not to use it. For general use, the Wazer Wifle is probably what I have found to be the most effective weapon, assuming you develop your skills to match the weapon.