Music: Slayer - Diabolus in Musika. It should be the abomination that was Illud Divinum Insanus by Morbid Angel (or Dream Theater's The Astonishing) really, but my younger self was crestfallen when these, of all, people succumbed to the groove/nu metal storm that was taking over the metal world back then.
Book: Kazuo Ishiguro - The Buried Giant. One of your favourite authors decides to take a dive into one of your favourite genres. A match made in heaven, right? Try again. As much as i love Ishiguro, the smack he got from the great Ursula Le Guin for this book was more than justified.
Movie: The Avatar, after nearly a hundred people told me to go see it because it's the best movie ever made or whatever. A series of clichés put together, zero character depth and most things happening just because the plot needs them to happen. Even the Aliens look human enough, so you will sympathize with them from the get go and just allow yourself to be absorbed by the SFX.