For the photographers of Yewis.

I wasn't going to post this here but I thought I might as well. I have another pointless project to complete which requires me to hassle other people. Therefore, please choose a couple of these questions about external camera flashes and give me some answers. Or you can answer them all but I wouldn't expect you to have the time.

1. Do you own an external flash or would you like to?
2. Do you think external flashes are better than built-in flashes?
3. Why?
4. Do you believe that an external flash is necessary to take good photographs or is a built-in flash enough?
5. Thinking about both external and built-in flashes, what are the differences between the two? (Quality of photos, methods of usage, etc)
6. What are the 'cons' of using an external flash?
7. What are the 'cons' of using a built-in flash?
8. Is there anything else you'd like to say which could help me answer the question is an external flash necessary?

I don't know that much about external flash and rarely use flash at all but @manisha can help here, I believe!