Aye, though I've played an Engineer and Infiltrator equally and though I may enjoy the Engineer the most, I've had more epic moments on my Infiltrator. I love it when you're squad is down, you're out of medi-gel, you have two shots left with your sniper and you're low on ammo with your SMG. Meanwhile, you're being flanked from both sides by enemy forces as Harbinger's bombarding you down the middle. As soon a the first Collector came, I jumped out and pistol whipped him to death. With my shield destroyed, I used the momentum of the moment to stealth and find cover at a higher location. I spammed two to three shots of incinerate on Harbinger, removing his barrier only to execute a one shot kill with Asssassin Stealth + sniper shot. When the next Collector got close, I stealthed again and released my last clip on my SMG into his head. With only one Collector left, I was infuriated when Harbinger took control. Using the same strategy as before, I finally wore him down and used my last bullet right between his eyes. The most epic fight on Horizon ever!