Well, I've never had a problem with the Glock 26, but when I tried to move to the G19 a few years back, I found that it limited my options just a little too much.
A flatter gun is a little easier to hide, but for me the loss of shooting comfort would not be worth the trade off. I'm not going to carry something I don't shoot regularly and well -- and I'm not going to shoot something regularly if it hurts my hand. It's a confidence thing: the gun that I carry is an extension of my hand, feels good there, and I can hit what I aim at with it.
Not to get too personal, but how do you usually dress?
And what's your basic body type: ectomorph, athletic, mesomorph, endomorph?
My personal website: Cornered Cat