I have no idea why this is on the HN front page, but I love making homemade bitters. Its so easy and the output product is really really good.
Unlike things like home distilling/brewing/winemaking its fairly easy to get to a point where the output is both cheaper and as good a quality as commercial offerings.
[edit] My favorite recipe from last year: https://www.chowhound.com/recipes/sunshine-bitters-11279