Magic is one of my favorite things about a fantasy setting. You are not bound to the laws we know of and you can rewrite basic physics and reality to whatever you want. Also, building the world around it is extremely fun.
I like ping-pongs between harder and softer magic systems, but my favorite hard-leaning magic system has to be bending from Avatar. There are four elements, most people who can bend get one, and they can really stretch them out.
As for softer magic systems, I enjoy when it helps to make the world function. So far, I kind of enjoy the Owl House. Sure there are glyphs that harden it, but there are some branches like healing and construction that make it seem more like these magic covens are divided like labor guilds, rather than strictly element.
Pact/Pale, the webserials by Wildbow (most well known for Worm, the super hero webserial).
Fairly hard, but a lot of specifics are left vague to the reader. But I love how it both feels 'programming-like' for making diagrams, but the 'basis' of magic being deals, agreements, and showmanship. It's just great.
Where can I read this webserial about the pale
Its at palewebserial.wordpress.com, assuming you're not just making a 'the pale' joke
I also love the Pact system. Been wanting to run a Pact dice game because the magic is very mutable for a creative party.
Yeah, it's definitely something that's been on my 'games I'd like to run someday' list.