I regularly try to love Google Drive, because the storage pricing is more flexible, etc. But in many ways it continues to be unusable. Up and downloading is too slow, sometimes the application doesn't notice that there are new files, sometimes the application crashes and you notice (hopefully after a few hours) that nothing was synced. This is all on the Mac. On Linux there even isn't an official client.
Then it misses all kind of useful features, like getting a list of all files that you shared and unsharing from there.
I always end up sticking with Dropbox because the whole experience is seamless.
That said, Google Drive as a web app rocks, especially with the Docs integration. My hunch is that Google wants it to be that way - users living in the web rather than drive being an extension to your hard disk.