Okay, I’ve decided on this theme. I see why it is the most popular.
On one hand, I like the idea of being different. Choosing the “most popular” theme is hard for me.
However, of all the free themes, this is the one I like the most. I’ll probably pay for the custom CSS option soon, though, so this shouldn’t be a problem. I really like the theme of Whatever, but might feel bad if I mimic it exactly. I really like simplicity.