Investors, which broker do you use and why?

I use XTB and it suits me very well. I use XTB broker because it offers a lot of cool things like a lot of educational material, whether on social media or on YouTube where I learn new and useful information all the time. I also like the platform which is very clear. As a last thing I would like to mention fractional shares, as XTB has recently added the option of trading fractional shares, which I like to use when I want to buy just a part of a stock, for example.