I find both Dropbox and Google drive to be fairly intuitive, though I haven't tried sharing on Google Drive yet. Sharing on Dropbox is pretty dead simple, where you simply log into your account online and click on the little chain link button next to any file or folder. How much more intuitive do you want?

*edit*
Google Drive is indeed much more difficult to share with. The sharing features there extend from when it was Google Docs, where you were mostly sharing things like documents and spreadsheets with other people so you could collaborate on them. It was less like a virtual drive than Dropbox is.

This is pretty much the reason I still keep both services around. I use Google Drive for all my personal stuff and for things like spreadsheets I need to work on with colleagues or my wife. Then I use Dropbox to quickly throw up a bunch of files for another person to download easily.

Dropbox is also great for all the things that tie into it and for the mobile apps. I can send photos I take with my phone to it. I also use something called "ToDo.txt" which is a text file-based to-do list that syncs using Dropbox.