There has been FAQs about web hosting sites. One of the commonest is as follows:

What is the most important thing if I look at the web hosting sites?

Answer  : In my point of view over the past few years, I think reliability is most important factor if you choose a web hosting site.

 Why? If it is not reliable, how can your website survive and people will not come back to your site if your site is down most of the time.

You might have different answer.