When it comes to the GNU/Linux distros, and how to choose the one that's right for you, it seems to come down to what you want and need on OS.
There is no single distro that does everything, but there is one that will fit your needs like a glove. The distro that works for some, might not be the distro that would work for you. Because of this, it becomes vital to do some research in order to see what distros are the best fit for you.
If there more than one distro that does what you need, the best thing you can do is to actually try them before you settle for one. Not all distros are created equal, since the communities behind them will develop them with a different set of priorities.
As such, the way they approach things is different from each other. That's why it's important to give a try to the distros that are geared toward the areas you need, in order to find which one is the one that will allow you to work how you feel most comfortable.
This is why I love GNU/Linux, you can choose the distro that fits me the best. And for me, the distro that fits the bill is Ubuntu. The one that fits you might be quite another all together, but we don't need to be on the same distro to reap the benefits of the GNU/Linux community. By using distros based on GNU/Linux, and making people aware that they have a choice on what OS to use, we can give something back to the GNU/Linux community.
As it comes, there is no single right answer. It comes to what questions you are asking, only then you will find the distro that will answer you ask.