Aozora Bunko recommendations for advanced learners

I was looking for a way to get all of the 青空文庫 books at once (because I'm lazy, and kind of a data hoarder, I guess), and I stumbled across this:

https://github.com/aozorabunko/aozorabunko

So you can download the entire website as a ZIP file, books and all. It's around 1.5GB. FWIW. (Yeah, they add new books on a regular basis, so it's not extremely useful, but in case you want to download ALL the 青空文庫, now you know how.)