If you don't want to go back to windows, you might want to give PCBSD or Haiku a chance, I've heard good things about them vis a vis their usability. I also seem to recall hearing good things about Mint Linux, but I haven't ever used it either.
That is why I used BoxCryptor in conjuction with cloud services even if certain cloud service has an encryption in place already (that just means my files are double-encrypted) since it encrypts my files on the fly, so the cloud service only has an encrypted copy of it.