I’ve settled on a theme I really like: blog.txt. It’s a minimalistic theme, with focus on pretty much one thing: the text (i.e., the content) of the site. I find that the readability is amazing (especially compared to that bright red mess I had previously). I thought that considering the topic of this blog, I might want to focus on my content instead of a shiny wrapper. 
Let me know what you think of the new look. There are a few things I’m going to tweak, but for the most part, the theme will remain as it is now.
I guess that if readability and focus on the text are what matters, this one is indeed better. Given the subject here, languages and learning, that may be a plus. The header is an improvement, but design-wise I really liked the other one. Maybe something for your new blog? Speaking of which, how about this?
Nils: Sorry to hear that I dropped the theme you liked. It thought it was too busy. The bright red was a bit much as well. I might end up trying to find a happy medium sometime down the right – a three column theme that isn’t so “flash bang.”
Neato, about your tumblelog. I’m still considering making one.