As far as blogging at free websites are concerned, WP is for serious stuff and is not user-friendly compared to blogger which is way too easy for anyone to adapt. Just an example of composing your posts, blogger has simple window with same functionality as any email compose box, WP on the other hand is technical in how you compose your postings. WP also looses a lot by not allowing Javascript (they gain in security but how many average users care about security anyway).