Feeling the same. Once I got to ~20 OEM bands, with at least of one of each major style, the appeal has started to wane. Pretty sure I have at least one style in all the major colors, except white.
For a long time I would buy different versions with the expectation that each new style could become my "new favorite". But after all these years and trials, I've settled on the sport band for working out/daily, and a Trail Loop or Alpine Loop as the mood suits.