I use both iCloud and Dropbox because I have some applications that are not iCloud compliant/compatible most notably the accounting system I use. If I had my "druthers", I would druther have everything on iCloud because it is unnoticeably transparent in implementation. The developers of my accounting system tell me they are working on getting Apple's approval for using iCloud and I am cheering them on.
I am a big fan of Dropbox, but because of the lack of universality more reluctant to use iCloud. Having said that, I just came across a piece of software that attempts to (partially) eliminate this issue. Check out
Cloud Mate , in which I have no vested interest. The video is quite intriguing, and the price quite reasonable.
