Web Hosting

I've been trying to figure out if it would be a good idea to switch web hosting services for this blog, It's My Life.  I've been going back and forth because I don't want my rating to go down and to be honest, I'm kind of scared because I don't know a whole lot about this sort of thing.  The good thing about this though is that there are websites that compare web hosting companies for you.  I have heard that there are more opportunities with some web host companies and I want to be able to take advantage of this.  As a reviewer, I look to web hosting reviews to help me understand the benefits of one company versus another, especially since I'm not as familiar as I would like to be on this subject.  What are your thoughts?  Have you had success with one of the web hosting providers?