Yes, many good OSS tools are ported to windows and the Mac but, BSD and Linux are home to free software and where much of the OSS innovation happens.

Of course if you aren't actually doing anything interesting then there won't be anything to excite you.

If you want to see exciting, try running multiple named desktops - something windows can't match - or the ability to run commands and tools under different users using su and sudo, or the ability to customise the desktop behaviour well beyond what the Mac and Windows desktop can do - try out different window managers, thems and panels.

Then you can run all your windows applications via wine, wineX or crossover. Or run vmware.

And of course you have graphical applications running remotely (and securely encrypted via ssh tunnels) using X windowing.

If you actually want to do something useful or interesting then linux is exciting, if you want the same buzz as moving from the stone-age windows 3.1 to the still-deriviative windows 95 or the Mac OS X / Linux clone that is XP, then you will be dissapointed. Windows XP doesn't suck as badly as the operating systems you used before, so moving to something secure and reliable won't seem that cool.

Your loss.