Great Designers work with just a few fonts. Once in awhile, you'll look for a specific feel that the regular serif or sans-serif won't deliver.
A "good font" means accurate adjustment between each possible combination of letters. And, of course, it's readable and looks good.
The main source today for high-quality fonts, in English and many other languages, is Google fonts. It has Great fonts with many weights, and also cool fonts.
Typographers today focus on creating outstanding fonts by order from clients, for sale or even for the public domain.
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