First, I limit my numbers. I have a simple standard when it comes to gear: it's gotta work, all the time, period. So, every time a mag acts up for whatever reason, it gets tossed. And I don't mean take it home and put it in the trash can. It gets funny during shooting, gives me a ftf once, twice, and I drop it, unload it, curbstomp its ass into oblivion, and replace it at the first occasion I get. Pistol, rifle, doesn't matter. No questionable gear in my kit, end of story. I keep them all loaded, and where they belong: 8 Pmags in my BDS chest rig, 6 USGI mags in my bandoleer (wont hold Pmags), 3 on my battle belt, and 2 20 rd USGI in my case with the SPR.
With pistol mags, it's different, because I have several different pistols, so it's a case by case decision which one I want to use when training in kit. So, they're in the ammo drawer (all loaded as well), ready to grab.
To my shame, I must admit that I actually do own one flake, and that's my Savage 10 rounder for my FCP. Reason why is that I haven't made up my mind if I want to keep the accustock, in which case I'll either get a different bottom metal with AICS mags, get on of the ridiculously expensive Dark Eagle Custom mags, or toss the stock and go with an XLR chassis, which will work with AICS mags as well. Until I finally pull a decision out of my complacent ass, I'll keep the factory piece of shit, and store it with the rifle, unloaded, because I think it is made from pressed Pringles lids and will blow up if I keep it loaded for longer than 2 hours.