OK. I had to do this. I know everyone loves Twilight and if you do and you are reading this, please do not take offence. But I for one am sick of it and would like to explain my dislike for it in very eloquent terms.
I will now proceed.
This is Isabella Swan.

First off let me tell you that Isabella Swan sounds very much like Elizabeth Swann. In fact, Isabella is the Spanish term for Elizabeth. This bothers me. Elizabeth Swann is awesome and kicks ass. Bella is....well, let's go with pathetic for now.
Bella's main personality traits are:
Clumsy.
Moody.
Low self esteem.
And who can forget this one: she loves her boyfriend so much, she became extremely depressed when he took off to Italy or wherever he went.
Sounds like your everyday teenage girl, no?
WRONG.
I'll tell you why you're wrong. Because no normal girl finds out that a vampire has been watching them sleep every night, and decides that it doesn't bother her.
Bella Swan is the reason that feminists all over the world have been up in arms.
People of the world, listen up. BELLA SWAN IS NOT A GOOD ROLE MODEL FOR YOU. WHAT'S WRONG WITH SCARLETT O' HARA, JANE EYRE, ELIZABETH BENNET?
Ok. You get the point. And if you thought Bella cheesed me off, you ain't seen nothin' yet.
This is Edward.

Does no-one else think he looks retarded in this pic? I try very hard to not make insulting comments about other people's appearances, but RPatz in the pic just makes me LOL. Edward in the book is supposed to be so beautiful that the sun pales in comparison to his dazzling sparkliness.
Oh yeah. About that.
As Dr. Brennan might say: Elephants Vampires are not purple do not sparkle. This is wrong.
Srsly.
Edward is also too perfect. I mean, it's not enough for him to be the most beautiful man on the planet. He also has to know everything about everything, play and compose on the piano like Mozart, and have super speed and strength. I fail to see how a perfect character like Edward could like a miserable sod like Bella. Also, perfect characters are boring. The point of a story is that you follow the character's journey, identify with their faults and root for them to come through their struggle. Sure, Edward struggles with not eating Bella, but apart from that there is no character development. Same can be said for Bella.
But the main reason I dislike Eddy is because he is so patronizing. I mean, "Bella, love."

BOOTH. SAYS. NO.
So to sum it all up, Twilight fails because both the characters are not likeable (at least not for me) and when you put two characters who fail as epically as these two together...yeah you get the point. Of course, the rabid fangirls and bad fanfic!Renesmee doesn't help. OK. I'm sorry if I have majorly peed somebody off. But I had to get it off my chest.