I like bad coffee but for different reasons (and to only up to a point): I enjoy the contrast it brings to the beans I roast myself. Sometimes I wonder if it's

I like bad coffee but for different reasons (and to only up to a point): I enjoy the contrast it brings to the beans I roast myself. Sometimes I wonder if it's worth the effort or if I'm any good at it but then I try some "bad" coffee and my faith is renewed. I have, however, gone too far in the past: I once roasted some Robusta beans just to see what they're like (some cheaper coffees are a blend of Robusta with superior Arabica beans). It was remarkably vile, even fresh: it was as though there was tire-fire in my mouth and the after-taste lingered for far too long.