My standard carry is a Glock 19 with one 15 round magazine in the pistol and a spare 15 round magazine on my belt. That's 30 rounds total, which I feel would be sufficient for practically all daily defense scenarios. Now if I am camping or traveling through a dangerous area, then I'll carry a 3rd magazine.
Around the house I carry a S&W 640 with an extra 5 rounds, or just to quickly run down the street to the local hardware or grocery store.
With the looming threat of an AWB I might rethink my daily carry piece if something is banned from ownership or just grandfathered in and very expensive to replace. It might make me go with my Taurus 617SS, with 7 rounds of .357 Magnum with a ported 2" barrel.