What is YOUR favorite heavy weapon? And why?

For me it’s the Cain, shit is so good, the way you charge up the shot, watch it fly through the air and then see some poor enemy get instantly disintegrated by the nuclear blast, I really wish we go power cells more often, so many bosses I didn’t get the change to use it on, also the little red glow of the hazard symbol whenever you’re in a dark environment is just the cherry on top, wish I got to shoot it at more batarians