I assume we would both already exclude the likes of Chrome, Edge, Opera, Safari, etc.
This will be a long reply though.
The TLDR is: Security is number one, so extensions are bad and built-in features are good. I hate the cryptocoin/adware/AI features but the degrading act of disabling it all is mercifully short. It also has to run on Linux, so I can't even consider browsers like Nook. Most important to me are the (1) Chrome features and (2) the Shields feature tacked on. I use profiles and shields very extensively.
The TLDR TLDR is: Shields good
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Caveat with the below is that Brave is full of bullshit to disable, with a new piece of bullshit added every year or so. That disparaging term is not one I use lightly!
The bad aspects are made worse by the fact the CEO of Brave is a person who I generally don't trust. I've been using Brave for years with the understanding I might have to jump ship at any moment.
Onto the good things:
One of the necessary things it provides is a browser which I can use to browse the internet, including captchas. For my mileage, Firefox has been broken for me on every platform I've used it on, every time I've tried to get back into using it, for years. I've exhausted all the time I ever wish to spend trying to fix a browser. Since I could not use Firefox to browse, it was not an option for me.
A second necessary requirement is that the browser should be available on the major desktop and mobile OSes, especially Linux. So, Orion, Nook, etc. don't count as browsers to me.
A third necessary requirement are timely security updates. Last I checked, Brave got security fixes from Chrome on a timely basis. Nice.
Then, there are a bunch of nice to haves. Brave has the Chromes profile which I use heavily (although Firefox is set to get a clone of Chrome's profiles soon-- the existing 'profiles' and 'containers' solutions were not usable alternatives.)
A second nice-to-have is telemetry - how often is my browser making requests unrelated to browsing, and to how many parties? I last checked this years ago, but I remember Brave performing well here.
The third nice thing is the Shields feature, which I've come to rely on. (If Firefox copied this wholesale, like they're doing with Chrome profiles, that would be a major improvement.) It's an easy-to-use interface to block ads and JavaScript. It works on mobile as well, which is a huge advantage.
Shields can be replicated with extensions, but I try to minimize the extensions I use. Each extension requires permissions for every site (!!!) So, if just one of these extensions developers were compromised, or the extension itself had a vulnerability, then I would be compromised too.