I use both Blogger and Wordpress. Personally, I love Wordpress because there are some amazing templates that can be used to personalize your blog. I learned Wordpress quickly, which helped me when I started using Blogger. Wordpress cannot be hooked up with Adsense, which is the downfall because you don't get paid at Wordpress. However, you can use Wordpress for affiliate marketing.
Blogger is simple to use, but the templates that are available are limited, unless you know HTML coding and know how to plug in other templates that can be found online. Blogger can also make some money through Adsense, so I do most of my blogging there.