I've got four long guns (three of which are ARs in different configurations), two shotguns, and a passel of handguns. I live in CA and carry when I'm on my property but have the gates open. I do not have a CA CCW permit because they are so hard to get...I qualify, (and without intending to sound political) BUT CA is a MAY ISSUE state, which means that the sheriff in your county decides if your reason is good enough or not. Too bad that this is subjective and has been proven to lead to cronyism. I do have a Utah permit, which allows me to carry in 30 some odd states, including Nevada, where we have a second home.
Why do I carry? In our rural neighborhood here in CA, a neighbor has had a gun pulled on him when he confronted a guy casing the neighborhood at 3am, a guy parked in front of our place at 5am scouting us and the neighbor across the street, then the next door neighbors, before being spooked and peeling out down the road, a guy coming around door to door asking if we had a travel trailer he could buy, another meth head jumped a different neighbor's fence at 1:00am on an early Sunday morning and try to break in. That neighbor's son is a LEO, and happened to be sitting at the kitchen table with his LEO buddies...didnt catch the guy, but did scare him off.
All of the above in the last 6 months, most of it in the last 3 months. This is also why I'd like a CA CCW permit...I'm afraid we'll come home from somewhere at night and interrupt a burglary, and I'll have no weapon on me to defend myself and DW. Hopefully the dogs would scare them off, but you never know.
A final word: I don't want to shoot anyone, ever, but would if I had to. As a further deterrent, I've installed Crimson Trace lasers on my home defense weapon and most of the weapons I carry, whether around the CA property or in states where I can concealed carry. I do this because psychologically, somehow I perceive that when a BG sees the red dot on his chest, he's more likely to run...and I won't have to shoot him. OTOH if I do have to shoot him, that red dot insures that the lead poisoning goes where it is intended, and nowhere else.