Did you wake up one morning and knew exactly how Windows worked? Wow, impressive stuff.
More to the point: I do believe that people that are satisfied with Windows should use it. Hell, I use MacOSX, Win2000, WinXP, PCLinuxOS, SimplyMEPIS, CentOS and Mandriva2008. Why, because that sort of thing interests me. Windows is purely at work (developer), and the rest of the OS's is purely at home for fun and learning.
If you start up Ubuntu and don't give it a proper chance to get to know it, you base your decision that it isn't any good on nothing much really. Maybe you just didn't like the look of it?
I've been using Linux since RedHat 5.0, and believe me, it has been infinitely more fun than using Windows. You can make it look and behave exactly as you want, everything can be changed to how you personally like it and the amount of new software you can install and use for free is mind-boggling. But hey, to each his own.
If you want an 'easier' way of trying Linux, give PCLinuxOS a try, running that one is a no-brainer for those who can't be bothered too much, but would still like to give Linux a try.
Last thought: Ubuntu is not the only Linux out there. Depending on your hardware/knowledge/time, another distribution might fit you better.