I know it was dead on arrival, but if I got a smartphone now it would probably be running the Ubuntu phone OS. Because I'd really like my smartphone to have the type of functionality a PC had in 1985... like ftp, a file browser and the ability to plug a keyboard and a screen into it.
At least I'd make damn sure that I have the option to replace the stock OS if I want to or when the manufacturer decides it's time to gimp their previous product line through updates.