Obviously I at least, and presumably Tom and others as well, am talking about pumpernickel-style bread, like Celia, which has a very strong and (of course there's no accounting for tastes) disagreeable taste.

White bread on the other hand is tasteless and bland, which for some things (toast, croques monsieur, etc.) can be good but mostly is just, you know, tasteless. Multi-grain breads or single-grain whole wheat breads are where it's at.