Heather Wright-Porto said
1 year, 5 months ago: When I started blogging, I started a personal, crafty blog on Blogger and a business blog on TypePad. My focus on the business blog was to write “how to” articles on blogging for Blogger and TypePad, so I had to have both. The reason I didn’t start with WordPress, is a fellow business associate had that covered and I pass her WP customers, and she passes me Blogger and TypePad customers, etc. So we were like a team w/o conflict. However, now a few years later and in writing my 2nd book on blogging, Creative Blogging, I am now very comfortable in WordPress and now assist my partner with Wordpress setups and design.
So…if I had to do over again, I would have made my business blog a WordPress blog. There is better SEO, so many cool plugins, a great user and help community, etc. However, I do continue to use the other platforms as my business is to support them as well – so to best support them, I have to use them, know them, grow with them and continue to write “how to” articles on them…now I’ve just added WordPress to the mix 
Heather 