I'm a Star Trek fan, but my love is mostly limited to the original cast. I don't mind the stuff that came later, but I've found I can live without it, too.
My favorite Star Trek merchandise is the stuff created between the end of the original series and the release of the first movie. Those were the days where Star Trek lived mostly in the fertile imaginations of the fans.
Which brings me to my point. I just won this little item of Ebay, a metal belt buckle made back in 1976: