Good tip from Alexander Fox:
The Mac default apps that come with your new Mac are great for everyday functionality. They fulfill their core purpose elegantly and simply. But when it comes to preferences to adjust and knobs to twist, Mac default apps have never been the best choice.
That’s wrong, as some of Apple’s basic Mac apps are best of breed, but I understand the sentiment. Good tips on how to change the default apps– Mail, Safari, Calendar, et al.