I use OneDrive as my cloud storage provider. To me cloud storage from the top-tier vendors seem to work well enough at this point. I probably would’ve used Google Drive, but once I learned they take it out of your Gmail storage space I declined. To Microsoft’s credit, your OneDrive storage space does not come out of your app Outlook email storage.
Yeah, they are all pretty similar. The storage usage is probably due to Google's gigantic user base, or perhaps due to their tenancy model (i.e. you get a 'google account' that also contains 'storage' instead of the other way around).
While some features like versioning and sharing and mail integration vary, nearly all of the 'big' ones do the same thing (OneDrive, iCloud, Google Drive, Dropbox, even box.com and MEGA to some extent).
Ironically, this sameness might actually be a good thing, as it makes it a bit more interchangeable (well, if we ignore the variety in native integrations), it would be pretty bad if there were significant missing features between them.
I do still keep my Dropbox because it has better sharing features. But I only use that with my wife and we haven’t used it to collaborate since she finished her Masters degree. If anyone has the edge with features, it probably is them. Some of the lesser known names I have accounts worth as well, but they’ve had sketchier history with storage issues. OneDrive simply gave me the most space for free, and I usually pimp myself out to the highest bidder.