I've seen many bloggers changing their blog template very often and that is what they should not.
Changing the look and appearance of your blog does not only harm your blogs on site optimization, but also harm your blog's prestige made with very hard work.
One template must be the identification of your blog,
Changing the appearance would confuse your returning audience and will result in high bounce rate.
In my view, one simple template is also best if you have writing skills.
For writers, a blog template that can show maximum of the content on the homepage is better than any other elegant, stylish or beautiful casual theme.
Showing the maximum on the homepage makes your blog open and more formal.
See there are too many websites and blogs that are popular enough and are never intended to change the layout and appearance.
For Instance : +Vashishtha Kapoor +Templateism +Facebook London +Black Hat Writing +Google India +The Times of India +Jagran Media +Fiverr +Freelancer +Twitter +My Blogger Tricks +My Blogger Lab
The aforesaid mentions are the links to well known websites having a single template for more than 2 years.
Every popular website never looks to change its appearance.
Some Beta Changes would help to increase your popularity and give you some matter to post about your blog.
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