Ubuntu is generally considered the easiest to install & use for basic use, because it has a lot of people working on getting the hardware to work without installing anything, and its targeted to normal people rather than computer geeks. But if you are a computer geek (like me), then you might prefer something that gives you more control, like OpenSUSE or Fedora or even KUbuntu (Ubuntu but with a different user interface)
Cheers,
Shervin.