There are so many to choose from and it was so difficult to decide on the one that I really like. Just take a look at the selection that she has put in her blog and you'll know what I mean. You can even ask for your own custom-made template for a price.
There are also tutorials to walk you through on installing the new templates and help you edit the template to suit your taste. For someone who doesn't know much about the HTML stuff, I can tell you that the steps are so easy to follow.
The downside is that, almost all of the widgets that I had earlier were deleted when I put in the new template especially the links that I created for my Patterns, Tutorials and my Bloglist. I'll be adding them in one by one. Luckily I saved all the external 3rd party HTMLs before putting in the new template.