I got ruined for regular coffee when I found a local shop that roasts its beans sorted by size . So it doesn't taste scorched. Apparently most commercial coffee makers roast them in arbitrary batches, which means by the time the big ones are roasted the small ones are burned. I know there's a lot more that can be done with roasting. But that one small change means you can have strong coffee without having burned coff…
just noting that when people say strong coffee, they usually mean "more caffeine", not "darker roast". and coffee people generally know that darker roasts have less caffeine.
i actually like darker roast too, when i want a caramelly coffee (by adding cream and sugar). my theory is that not only does a dark roast better hide lower quality beans, but starbucks knows that most people put cream and sugar in their coffee and darker roasts are better for that, which is why it's so popular.
but when i want straight brewed coffee, i seem to prefer a medium roast.