I thought I would put my two cents worth in on tumbr. I use it because it is easy. I would much rather spend my time with my camera than at my computer. I have used wordpress before, and frankly it’s complicated and frustrating.
My main complaint with tumblr is that as the supposed best spot for photography blogs, the file size it allows for uploads is very small. I shoot raw images that are 22mp or larger and tumblr allows for 10mp. However, once we get into using lightroom, there is a super easy way to change the file as well as keep your original file.