I've been using Dropbox with great results for some time now.
My second favorite is Drive. Yes it uses more resources, but I've got all my macs loaded with ram & high capacity SSD's so that's no problem. As far as the paranoia around Google's honesty & full disclosure "we own your data" it's really no different than any other, it's just that Google doesn't cloak it in legalese. If you're worried get off the web ASAP.
Besides, if paranoia is your thing, do yourself a favor & read up on "big data" ie: data collection companies that rather silently fly under the radar (so far) collecting everything about you & millions around the globe. Even from those that don't have a computer.
Think that's bad? It would really surprise many if you only knew what your insurance company knows about you.
We're living in the era of targeted marketing, hi-tech is our best friend or worst enemy all depending on how you choose to view it.
Finally, Sky Drive is also quite good. I've been using it since before they reduced the amount of free space, yet don't let that deter you, MS has done a great job with this Azure based service.