Is there a particular piece of code (as in, a single package/file/function) that jumps out to you as "gorgeous?" When I look at a random Hashicorp repo, it strikes me an impenetrable labyrinth.
Try to add a new feature or see how some feature works, with consul I did some greps over some features I used and followed the code.. was able to put a merge request upstream changing a behaviour I didn't like (configurable) within 4h (that didn't get accepted and that's OK)