If you want to use one of Linux Mint’s various distributions (XFCE would be my choice), but feel locked into Ubuntu due to it’s free 5GB of Ubuntu One cloud storage, you can install Ubuntu One client on Linux Mint too, taking advantage of both.
sudo add-apt-repository ppa:noobslab/apps
sudo apt-get update
sudo apt-get install ubuntuone-client ubuntuone-control-panel ubuntuone-client-proxy ubuntuone-control-panel-qt
Finally, just configure Ubuntu One client with your account username and password just as you would in Ubuntu/Kubuntu/Xubuntu/Lubuntu/Ubuntu Studio..