Just unlocked the HCOG last night for the SMG, absolutely hated it, I felt way more inaccurate and switched back to using just Iron Sights, but that's personal preference. I pretty much stick to the SMG, Carbine, and Hemlock. On rare occasion when I'm feeling saucy I'll bust out the LMG. Right now I'm nursing a 5.2 K/D overall, with a 2.1 K/D against other Pilots. I'm really enjoying the game and have managed to play consistently, I play two very different styles based on if I'm just a Pilot or I jump into a Titan. Pilot, I'm very methodical and sneaky. Where in my Titan, (Stryder, 40mm cannon w/ burst fire, vortex shield, cluster missile, fast autoloader, survivor) I'm a balls to the wall aggressive player. But I use the dashing to my advantage to out strafe the stronger titans, and get in and out with melees.