I'm a firm believer in artistic integrity and faithfulness to source material. Re-boots and re-imaginings are generally just laziness. If a writer really understands and cares about a particular concept, they are able to use what came before as inspiration to create new stories that expand and evolve the canon, while still remaining true to the original concept (in the field of comics, guys like Thomas, Englehart, and Busiek were masters of this). Personally, I'd rather build on something than replace it. It may be more of a challenge, but it's also more gratifying and results in a deeper and richer tapestry.