I have never had anything from Magic Hat I have liked, ever. Two years in a row, a buddy suckered me into, "I hear this fall seasonal is really good!" I then choked down 3 bottles of 4 different ****ty beers, two years in a row. Never. Again.
Most things by Sierra Nevada taste the same to me, with the exception of their barley wine, and I do not find them palatable.
The worst beer I have ever had? Breckenridge Vanilla Porter. It tasted like someone mixed vanilla ice cream, with burnt marshmallows, and like another 2 cups of sugar. My teeth hurt thinking about that volume of sickening sweetness.