Size for sure. Carryability is a big factor. If I can't carry without printing, that's a deal breaker. With a 32" waist, a G17 or p320c is a challenge.
No gadget but I may try one sometime.
I have invested a lot in the Glock platform--holsters, mags, a ton of spare parts, and multiple guns. To me Glock is a standard--the AR-15 of handguns, so I'm glad to have gone back to carrying them.