Food wise:
Shamrock Shakes - It's just a minty vanilla milkshake dyed green.
Sushi (I'm a bit reluctant to put that here since I just never developed a taste for fish, but it just looks so good)
Movie wise:
The World's End - It just bored me, and I couldn't be bothered to care about the characters. Also, Pegg's character reveal towards the end was very clearly shown in the opening of the movie.
ParaNorman - MovieBob hyped the shit out of this one. It just bored me to tears.
Seven Psychopaths - All the ads displayed this as a comedy, and it looked very entertaining, but aside from maybe one scene, this movie wasn't funny, and was instead very violent.
Show wise:
Fullmetal Alchemist - EVERYONE hyped the shit out of this, and I only found it OK at best.
Castle - Ok, so I loved the first two seasons, but after that it was just bllluuuuuuuuuuuuuuuuuuuuuhhhhhhhhhh.
Futurama - This only applies to the show's revival on Comedy Central, which by and large weren't funny. Can't really say anything about the straight to DVD specials as I only saw one, and can't remember it that well.
Book wise:
Ender's Game - Bored the shit out of me, couldn't stand any of the characters, and a lot of their reasoning was asstarted.
Twilight - My English teacher was so adamant with how great it was, so I gave it a go. Still don't get why it's such a huge it.
Heat Wave - I expected a lot from this because the show it comes from was great, and in the show they were showing just how huge and successful it was. In reality, it was short, boring, and might as well had the main characters be named Mick Mastle and Make Meckket.