Sure, I read them. Many of them were about operations against US citizens. However, not all of them were. Here[1] is one example that comes to mind. That story in this leak is interesting, newsworthy, had serious repercussions, and was potentially unethical for the US government to do. However it is also exactly the type of thing everyone expects the NSA to be doing and it doesn't involve the spying on any Americans. This is the type of leak that will ensure that Snowden isn't embraced by the US government.
[1] - https://www.theguardian.com/world/2014/aug/13/snowden-nsa-sy...