I CCW'd a Glock 19 (using a Milt Sparks Executives Companion IWB holster) for years when I lived in the Seattle area. I moved to Florida in 2007 and found it difficult to keep the G19 concealed when wearing warm weather clothing, especially on breezy days. In addition the lighter fabrics don't hang and drape the way heavier fabrics do and many times my concealment shirt would ride up and get caught between the grip and my body creating an unusual bulge.
I tried pocket carry with several different small frame pistols but I didn't like the weight and bulk of the gun rubbing against my thigh when I'm sweaty, the pistol shifting in my pocket (despite pocket holsters), and, most importantly, the difficulty in quickly drawing the gun(s) from my pocket (virtually impossible when sitting in a vehicle), especially when my hands are sweaty from the heat.
After living in Florida for a few months and trying different guns/carry methods I purchased a Kahr PM-9 and a Milt Sparks Summer Special II leather IWB holster. I modified the holster (cut off excess leather around the periphery) to facilitate appendix carry. I've been carrying this way for about three years and so far it's been good to go.
I also considered a Glock 26, but found it just as problematic as my Glock 19 to CCW.
Good luck with your choice.