Ten question before choosing web hosting

Q. Which is the platform of web hosting(Win, Unix or Lunix.etc) Q. How reliable is the service of a web host? Q. What kind of performance can I expect? Q. How good is email and phone support? Q. How much will it cost me? Q. How much bandwidth will I need for data transfer? Q. What about a control panel? Q. What about a POP3 account? Q. What about anti spam and viruses features? Q. What about running my own online store? Q. What about Online Marketing Support?