About 1 year ago today I brewed up an Amber Ale, it was a BIAB kit from Midwest i believe. I didn't have my fermentation chamber back then, so fermentation temps were a little high and caused some estery off-flavors. I am not a fan of the ester flavor, so its been sitting in bottles in my brew closet ever since. We'll occasionally use a bottle for cooking, but other than that i didn't know what to do with it.
So this past weekend I tossed a few in the fridge to give them a try. Popped one open and wow, the ester flavor is gone. Now its a nicely balanced amber!! I was amazed to say the least.
I've always been afraid that aging will cause my brews to lose their hop flavor or something to that effect and never imagined that they could get that much better after a year.