Request for Feedback: NAS Devices

As my visitors are the best average consumer available I have some questions for you. And with your answers I will be capable of doing nice things ;-)

This is your way to express what you want or tell me what you need.

1. If you would buy a NAS, why would you buy a NAS and not a USB DISK?
2. What is the main reason why you want to buy a NAS?
3. Is price the most important part in your descision or also the features?
4. What features are the most important part for you?
5. What kind of features do you want but do not see in NAS devices available in the market?
6. Are you using a NAS for multiple purposes and what purposes?
7. If you buy a NAS will that be in a webshop or do you go to a normal retailstore?

Add anything else I forgot