I won't carry a gun that I don't have a comfortable and useable holster for.
But, I've got several guns to carry at this point with good holsters for each. It's okay for me to wait a couple months to get the right (errr... I mean left) holster.
Back when I only had my one first gun, I didn't carry it very much at all because the holster I had sucked. It took several tries to find a good one and I didn't carry all that time. Definitely no mexican carry going on then!