On this blog it may not make much sense, at least not yet, but WordPress has one category functionality that TypePad does not have: nested categories, or parent categories and children categories if you so wish. Dividing your categories into more categories is a very useful feature if you are blogging about topics within a topic. It can give your blog a much better structure than just listing the categories.
On this blog I could for instance make something like this:
where Pros and Cons are children categories of their parent categories, TypePad and WordPress. This is very nice if you want to structure your topics neatly instead of just listing them one by one. Mind you, by default, categories are ordered alphabetically. If you desire a different order, you need to put the categories into a text widget by hand.
So how do you do it?
As you develop your blog, you may decided to change the overall topic of your blog. Thus, you may want to re-categorize your posts. Or, as the number of posts grow you decide to stremline your topics and cut down on categories (and use tags instead). How easy is that in TypePad versus WordPress?