Here's a list for you....

For whatever reason there is, explainable or not,
3 things that aren't as good as they used to be.

Mine?
Domino's Pizza - not sure what it is, but it ain't as good as it used to be. Can't hardly eat it anymore
Fast Food milkshakes - again, don't really enjoy them anymore
The small Reese's Peanut Butter Cups - Oh, I can still eat them 'til they come out my nose, but they don't taste as good as they used to.

Yours?