I the first three or four years, I went through 15 or 20 different carry guns. Now I am about nine years down the road and the total is probably approaching 50. Fortunately, I can afford to own more than one at a time, and buy one, sell one...
But these days, I haven't bought or sold a carry gun in the last three-four years.
To answer your question directly, my first was a Glock G23. I carried it for a while, and could never get comfortable with it. It was a brick. I have owned (and sold) several double stacks since then.
If I die one day due to insufficient ammo capacity, you may mark my grave as such. In the mean time, I will comfortably carry a single stack 1911, and will live (and die) with the ammo capacity it affords.