With the amount of data I have, it makes 0 sense to use cloud services as my main means of backups. I like having control over the box I'm backing up to, even though I'm sure my data would be managed properly on Google's cloud servers. I work in IT so I suppose that comes by nature.
Quite honestly I'll likely always be running a NAS at home, especially now that I've set up video surveillance (Motion) on my property, so feeds are always being saved when things are moving. I put some thought into the hardware that went into that box, so it shouldn't be sucking down power like a top end gaming rig. Based on my watt meter and some usage estimates with the current electricity rate in my area, it should run me about 50 a year to power... a small price when you consider it's over the course of 12 months, but of course you still take a hit on the initial server cost too. I suppose it's a price I'd rather pay.
Having your own NAS doesn't do any justice in regard to a house fire, so the +1 there would go to cloud services. At the same token, cloud servers aren't 100% excluded from natural disasters either. But I suppose cloud services would still take the cake since timing is likely on their side:
- NAS - House Fire - Chances are your server is gone.
- Cloud - House Fire - The likelihood of cloud services magically losing your data during that time is slim/none, but it's always possible.
Pros and cons to each scenario, some that may sway you to cloud services or vice versa. Personal opinion: I'm never letting go of my NAS.