If you were to start your own small business, what would it be?

I was thinking about starting my own small business, I have a few possible directions that I was considering going in, however I was hoping to reap the knowledge of the collective on the topic.

What type of business would you start up? Taking into account the current financial climate?

Do you own a small business that you have recently set up? What do you do? What issues have you encountered? Would you do anything differently?

Any help, advice and pearls of wisdom would be much appreciated!