I run
No More Fat Dad on Wordpress. I really like the Wordpress platform, especially after trying several others over the years.
Both Wordpress and Blogger will give you want you want for making posts. The differences come down to the options. Here's a good/fair comparisson between the two -
Pulsed: Blogger vs. Wordpress.com Comparison Chart.
They're both free, so why not create an account on each one and take a look around?
I've found blogging about my
weight loss to be a huge help. I get comments and emails about how I'm motivating others and (besides being very humbling) that just pushes me to keep going.
I'll be happy to help if you need any assistance.
NMFD