I ditched the G26 for the XD9. Sub compact is just a bit to small for me, but I stuck with the 9 for increased rounds, just incase I have to lay down some suppressive fire if engaged with multiple targets. Very interesting poll!
Just to clarify before answering, what do you mean by "compact Glock," and "midsize Glock?" Do you mean G26/27/etc-ish and G19/23/etc-ish respectively?
Glock calls their G19/23/etc, "compact," and their G26/27/etc "subcompact."
For now my Para litehawg 9mm.. But I would like to soon hang it up to keep her pretty and keep it from getting holster wear. Loosely looking for a S&W Bodyguard or a Ruger LCP for my carry.