I am a huge fan of complex tone, a la Chris Squire, Pete Townshend, Les Claypool, etc.
For the gauge of the string, they are actually MORE flexible under the fingers than thinner strings by other brands (like the Ernie Ball misnomer "super slinky" ), and they have punchy highs and midrange over tones that give you that piano-string-like clarity to cut through the wash of distorted guitars, crashing cymbals and pretty much anything else, and give your bass tone independence and clarity in the mix.
The strings have such high output, I find with my set up, when I really dig in, I can even get soft clipping distortion like Chris Squire gets running his split signal through a guitar amp.
When I was in my teens, I tried out a bunch of other brands, like GHS bass boomers, and Dean Markley Blue Steels. Nothing compares to DR's quality, sound, complexity of tone, amplitude, and the length of life.
My last set I put on while recording an album with my band this past summer. More than 6 months later, after heavy use rehearsing and gigging, they still sound better "dead" than Ernie Ball strings sound when brand new.