I did it mostly because my home-brewed website wasn’t being fully utilized. WordPress gave me the basics of what I wanted: provide some static contact, make it easy to link to anything I have under development, and provide the dynamic content (aka blog entries).
WordPress offers a decent number of themes and lots of ways to customize. I also wanted to be able to upload photos and videos more directly instead of going through Picasa or Fickr.
The migration is easy — you can import directly into WordPress from Blogger. While in WordPress:
I’m not sure what went wrong for me but I lost all the formatting the articles had.
There were some problems with funky characters that caused MarsEdit issues but some editting took care of that.