if you are a Blogger user, you are probably using a generic template provided by them. That means that your blog looks like thousands of other blogspot blogs on the web.
if you want to stand out from the rest, it would be a good idea to select a unique template. If you are good at XML and graphics, go ahead and design you own. If not pay someone to design it for you. You can also choose from among the various blogger templates available for free on the net.
Blogcrowds is one of the best sources for free Blogger templates. They are all free for you to download and tweak. You can also see a demo of each template before you adopt them.