Well, seeing the new Mitchell and Webb “I’m a Mac, I’m a PC” adverts I thought that I’d have a go myself.
Mac: I’m a Mac
Windows: I’m a Windows
Linux: And We’re Linux!
Mac: I’m a bit tubby around the waist but I can get away with it because all of the machines I run on are expensive and have some muscle behind them.
Windows: I’m very fat; I can’t run, I sometimes even find it hard to walk. I’m designed to run on all kinds of machines, but I just can’t do too much. When I get a cold virus I’m really bad, my immune system just can’t cope.
Linux: We’re all kinds of shapes and sizes. You’ll find the right one of us for you and your machine. Make it as fast as lightening or fully featured; just pick the one looks the best to you.
Well don’t blame me that it turned out crap!
The Blog of Rob 
I don’t think that would make it to be a commercial, but it’s interesting to think about.