I have used ubuntu version 15 debian and I have to say that it the best operation system that I have used.
Well most the users are initially coming from the windows or mac background and find a bit difficult to adjust to ubuntu, initially it has some learning curve but eventually you get better at it and most of all you will love it.
Consider the following advantages, everything is done through command line, it is the most secure operating system, its open source meaning that its free.
Specially if you are an open source programmer this is must use operating system for you.