On days that I have to work I wear my Fobus paddle holster. Since I can't carry at work I can just slip it off and lock my gun in my car. On days I don't work, I use an awesome IWB holster made by fellow INGO brother Rookie. He makes a quality leather holster with a thick kydex mold that fits my gun very snug. The price is unbeatable. I can wear a t-shirt and shorts and my G19 doesn't print at all.
I carry my Glock 26 in a Raven Concealement Phantom with the IWB J-hooks. It came with OWB loops if I wanted to carry OWB, It's comfortable and concealable either way, outstanding product. I find strong side offers the greatest level of comfort for me, especially when I'm driving. IWB with the Raven is very concealable even carried strong side with a longer t-shirt.