What's the go-to for rate limiting API requests?

hey all, i've been thinking about api design lately. when you're building out apis, especially for public use, rate limiting seems pretty crucial to prevent abuse and keep things stable. i've seen a few approaches, like token buckets and leaky buckets, and some libraries handle it with fixed windows or sliding windows. what's your favorite method or pattern for implementing api rate limiting, and in what scenarios do you find certain techniques work best? curious to hear real-world experiences.