Sitcoms definitely aren't as good. While there are some great ones like Corner Gas and Big Bang Theory, most of them try to be "edgey" with sex jokes. Sitcoms were much more robust in the 0s, where they took on real life controversial issues. All in the Family, Maude, Three's Company, The Jeffersons...you don't get those kinds of topics anymore in sitcoms. Which is odd, since all those old shows were created by liberals, with liberal views in the show (for the most part), dealing with topics liberal people felt should be discussed. But today, those same liberal people scream bloody murder if you would try to do a show like The Jeffersons, or god forbid, All in the Family. Seems like now that they got their topics and opinions out in the open and in the "mainstream", you can't tal about controversial things anymore.
Apart from that, McDonalds isn't as good as it used to be. Saturday morning cartoons are non-existant, professional wrestling, Lego, toys in general...the weather is the same (actually, it's starting to cool down a bit now). Don't forget, we are all older now, so even if things like Leg stayed the same, we probably wouldn't feel the same way about it as we used to. Your tastes and attitude changes as you get older, so all the things listed may actually still be as good; it is probably us who has changed more.