First carry gun

TL;DR: looking for my first pistol purchase to conceal carry on pretty much a daily basis and I can't decide on which gun to get.I shot all of the recommended concealed carry guns. To give some preliminary information I am a pretty skinny guy. About 5'9" and about 128 pounds. the 43x seems to fill my hand just right. The Glock 19 is pretty comfortable to but everybody's telling me I'm too skinny to carry that gun. With some of my outfits it doesn't really print and I don't mind carrying it but I haven't carried it around all day with 15 rounds of ammo in it and I'm sure it will get heavy. But then I think to myself I should just get a 43 with a mag extension so that I have the option of having a teeny tiny gun or rocking it with the mag extensions. But then I think of how nice the 43x felt in my hand. I've been back and forth about it and I'm wondering if maybe just modern some part of a 43 would make it feel better and still give me the tiny gun. Just looking for some input. And it's not just about how the gun feels I want to shoot it well. I'm kind of inconsistent so far between the different guns I've tried but I think that's just a simple as picking a gun and then doing some proper training with it until I learn to fire that pistol effectively. I think through training I can be effective with any one of the pistols given enough time. via /r/CCW http://bit.ly/2LGbARW