There are many iPod mechanisms that millions of people like. But when you think about what you really like you find one that works for you and your stick to it. For many people it is the iPod that also plays videos (I have that one too) because it can do so many things and if you are a traveler like I am you can use it while on the plane to entertain yourself. But for me, for my everyday use, I LOVE the iPod Shuffle.
This tiny little device (no bigger than a matchbook and really light) holds between 250 to 500 songs depending on gigabytes that the device has. I have the 2 GB one so I have a lot of songs on mine. It has this little clip (like one of those big black work paper clips) that you can use to clip the device right on to your cloths and then g about your business. For me I clip it on, put in my ear buds and go jogging. It is the best.
Music is an important part of my workout, I love listening to the playlist that I put together just for the purpose of jogging and they all fit on my tiny iPod shuffle. This little baby comes in a multitude of colors although I prefer the pink one that I have. But if you like blue, silver, green, purple or ice blue you can find one that you will like. And if size is what you are looking for you will absolutely love this one.
Now granted, the only thing that the IPod Shuffle is good for is playing music and has a great size but if you want more functionality than that you need to move up to another device. I like the classic iPod because I can also record on it and listen to video on it. But for everyday bopping around and having some musical company, I will always choose my shuffle.