When you signup with a blog webhost you get they provide you with great templates for your blog for eg. Wordpress offers very good pre-designed templates for their users. These templates are good if you are beginner but if you are experienced and have some knowledge of HTML or similar languages then you can make it very simple to upload a template from your computer and using it to make your blog look pretty cool and different from others. These templates are easily available online and can also be made by oneself.