if you have any interest in baseball, https://www.retrosheet.org/ https://www.retrosheet.org/ might be of interest. They have play-by-play accounts for every Ma

if you have any interest in baseball, https://www.retrosheet.org/ https://www.retrosheet.org/ might be of interest. They have play-by-play accounts for every Major League baseball game going back to 1914. this strikes me as a good testbed for personal projects, because: - it's enough data to be inconvenient, but can still definitely fit on a single machine - it comes in a weird format that is sort of a pain to process, which is good practice - just loading each event into a database won't be enough, you'll have to transform and reorganize it further to support answering interesting questions - last I checked, there are undocumented but public APIs for more recent MLB games (on some MLB website), so automatically scraping those and incorporating them into the retrosheet data is another interesting challenge.