Being a designer and in love with typography over the years I have collected a TON of fonts. I used to keep lots of them installed at once, it’s just nice to have all of them ready to use when prototyping logos and such.
But recently I started to use a font manager, as it can really free up system resources when you don’t need them all. After a bit of research I’ve settled with FontBase (I’m not affiliated with them). Even in its free version it’s just nice and fast. It scans a folder for new fonts added, and the possibility to install Google Fonts with a click is a plus. Great piece of software.