For starters choosing web hosting is not connected with SEO.Big mistake.Your website hosting choice is crucial: it’s the foundation of your website success.
Uptime – Google won’t rank your website high if it is often unavailable.
Service reputation (I perform a few Google searches to check what people say about the service provider)
Never purchase web hosting without reading some reviews and forum posts about certain web hosting company.
One is not enough.Try at least five-ten reviews or forum posts.It is common practice for unethical web host to write
false forum posts and reviews.
Some great hosting providers could be found here : Hosting reviews