I used to be a fan of Postman (in the early beginnings of the tool), but as it added features I didn't use and became slower and slower, I got tired of it.
Eventually, I figured I should try something true and tested, so I went for cURL. It takes a bit of practice and memory to learn how to do even the basics, but once it's there, it's a rock solid tool, with support for almost everything you could think of.
I used to use Postman exclusively, but like you started trying curl.
And then I realized curl was absolutely brilliant for my common uses because I’d write simple scripts that would mean all I needed to pass in were the arguments that changed.
I took it another step further and had my script lookup a folder that had a whole bunch of different types of requests that I could then trigger with a single command.
Finally, I created a version that plugged into fzf and made it super easy for me to run a whole bunch of common scripts trivially from the command line.
The great thing about command line based programs is the incredible ease with which you can create repeatable series of commands that can be run both interactively or programmatically, and the UX can be tailored to suit the specific needs of what you’re trying to do.
Eventually, I figured I should try something true and tested, so I went for cURL. It takes a bit of practice and memory to learn how to do even the basics, but once it's there, it's a rock solid tool, with support for almost everything you could think of.