There are so many different goals we all have when we put our fingers to the keyboard. Because of that, none of us should base our success off of what other people are doing. Just because someone gets all the comments and page views, doesn't mean your blog is pointless. Just because someone posts daily when you only post weekly, doesn't mean your blog is pointless.
We need to keep these things in mind when we are analyzing our blog and its success. Not all of us have ideas for blog posts daily, and not all of us have the network to give us 20 comments on every post. That is ok! For most of us, part of blogging is personal -- we do it for us! It is important to keep that in mind when you start comparing yourself to others.
No one can write like you can, and no one is going to have the same exact thoughts and statements as you. Your words are valuable, no matter how successful you think they are. We all have value, and our blogs mean something unique to each of us!