I started with Wordpress and plan on sticking with it. But I've since made a tumblr for my photos and NYC-related tidbits...and find it much easier to blog on a whim on Tumblr than on Wordpress, despite the excellence of the latter platform. It's kind of amazing to me how the simplicity and constrictiveness of a platform, such as Tumblr (and Twitter, for that matter), makes it more inviting to consistently participate in. And I'd say consistent publishing -- especially in the face of apathy or silence -- is a huge part of building readership.