I do not and never have liked IWB - just me! I always use OWB 3 to 3.30. I am tho keen to always have some cant .. preferably quite generous ... seems to suit my draw and also allows for gun grips to stay almost above the gun muzzle - thus decreasing printing by showing butt thru my shirt at back.
Many folk like vertical I know, and yet even for IDPA I still want cant.
This rig is a Brit made ''Horseshoe Leather'', in fact made for Govt 1911 but is just great for my BHP - cant is absolute minimum I can like - but seeing as this beaut' rig was given to me - who am I to complain. Worked well for IDPA last year.
This is the first rig I got for my SIG 226, a Dillon - here we have quite good cant, and draw is just great. Rig holds gun tight to me ... printing is no problem. I have since got a K&D rig, even nicer and quite ornate, that is being broken in right now, cant is similar.
Here, my SP-101 rig ... a very well made copy (also by K&D) of my original Jim Burke rig. This cant is superb - suits this gun great. Sadly Jim (Paris TX) died not too many months after I bought the original rig from him in Dallas - thus my wish to have a copy and perpetuate his design.
I also use Fobus and Kydex rigs sometimes - again, with quite generous cant. So - how do others view cant? Like it - or not?