why did people like Depeche Mode so much? and which ones did and why many also didnt?

what was Depeche Mode style like and how it changed? what most of
their songs were about and what were some of the great ones and why?

how popular in England too or elsewhere and WHICH YEARS?

why not more popular? HOW COMPARED TO PINK FLOYD IN ART WORK
ORIGINALITY AND WHY?

thansk for your answers!