We or at least me, carry because it provides me a sense of comfort regardless of the odds of being a victim of assault/violent crimes and that to me is worth the price of admission.
What I'm deciding in this thread is whether carrying an extra mag is a necessity in spite of the inconvenience it will inevitably cause me. I'm not saying an extra mag is not worth carrying or swaying extra mags carrier (to each his own, it's still America and we have the freedom to choose). I'm trying to figure out a balance between comfort and the feeling of comfort from having a firearm.
If one feels more comfortable with having 1-4 spare mags on their person, I say go for it. Peace of mind is worth its weight in gold.
My holster for my M&P 9 with CT green laserguard came in and it's incredibly comfortable with very little imprint even in fitted Diesel low rise jeans, shorts, or a decently form fitting T-shirt. Only issue is the barrel length which digs into the base of my private when sitting down. The Full Size is not quite ready for carry as of yet, need another 100 rounds through the pistol and the intended carry mag (tomorrow at the range should do it).
I completely understand carrying a lower round pistol and having spare mags offers a comfort feeling but when carrying high rounds firearm (12+), an extra mag may not be necessity, perhaps only in extreme cases.
Either way, I've decided to carry the MP9 FS without a spare mag as my carry because it's extremely comfortable for me while having the capacity to handle most situation adequately.
Thanks for all the input fellas, it was eye opening.