I like cannons just because they look big and cool, i would love MA to do more with them. Maybe an L series, a chain gun doom style, or a cannon amp as you can't amp-scope or laser them.
C'mon MA wheres the Cannon love?
I use hl11 at the moment but cant wait untill I am skilled anough to use like hl15+ and also have enough peds or luck to get my hands on an unlimited version on one of them.
Started with the opalo (which I still use), upgraded to the Justifier MKII which is still my main weapon and favourite even though I'm no where near max'ing it.