I really like how hawtin used the 303 in his plasikman productions, trax like do da do and the muzik album. 303 master imo. I know there's sooo much more and many people have used it well in different ways, but he's used it just how i like it.
As a listener i still fins it being used to good effect in various styles of techno but not sure how to improve the kind of sounds i mentioned above. Bit like a guitar i suppose, if used well, it will always be great to hear even though you've heard it loads before.