I have been a linux user for 10+ years, and i just had my worst linux experience today with Ubuntu. Unfortunately, the ubuntu 12.04 installer does not ask me for the destination harddrive i want to install the rootfs on. Having a total of 4 drives on my PC, four normal sata drives, and one raid-1 1-terabyte drive. After clicking on "wanting to install ubuntu linux with windows", Ubuntu installer automatically reformat my 1-terabyte drive and install the os on there. I did not even have a chance to say NO. This is the worst ubuntu installer ever, it makes to much assumption for the user. I mind as well use windows instead if ubuntu was this dumb.
As the result, i lost 600GB worth of data. Ubuntu needs to fire the project manager who is responsible for the installer. It is trash. I promise not to use Ubuntu again.