I've reached level 24 in 80 hours and just completed the Glowing Sea main quest. I have found 140 locations and cleared only 40 of them fully.. I kind of feel I've done so much already but have only scratched the surface. I made a rule early on, I only go in and clear every 4th location I find, this way I keep the game fresh for future playthroughs. I'm building a sneaky, lone SS, no companions unless forced by the main quest. Main guns I'm using right now are Tactical Powerful Hunting Rifle, Deliverer, Tactical Combat Rifle and The Reba II. Toughest location so far for me is Salem, literally ran.