Cant is also effected by drawing style, there was a time in firearm history where the gun was drawn more rearward, tipped to point forward at the point it cleared the holster , the elbow then moved forward and planted firmly on the side and the gun fired from that point without aiming, you've seen it in old westerns. The side plant was taught to law enforcement as late as the 70s that I know of as my dad shot that way in fact he never used two hands to shoot a handgun was taught by law enforcement and was very accurate. Nowadays with the forward cant the barrel is drawn out of the holster in a forward type sweep and the barrel pointed forward during the rotation of the arm and wrist as it comes up to the ready position. In the end however it is personal preference and what feels good to the shooter. If ya like it go for it.