I use WordPress mortoray.com. I've yet to find a simple alternative in the same price class. I enjoy the statistics I get, the simple ability to upload images, and just never worry about upgrades, downtime, and such things.
I don't use their editor for most things. I write in markdown and convert to HTML locally.
The biggest point for me is the administration. I don't want any additional technical stress with managing my provider. This also makes it unlikely I'll switch unless I find an awesome alternative. The headache of tranferring has to be well worth it.
What bugs me the most about WordPress are the poor quality templates. Virtually none of them work with all styles of articles, have header images, a decent intro page, etc. They're all half-backed and incomplete.
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