Simple, because my name is Amber, and it seems like all of the Ambers in film and literature are bitchy whores.
To recap slightly, Amber the Waitress appears on page 168:
"Hello. My name is Amber, and I'll be your server tonight. What can I get you to drink?" I didn't miss that she was speaking only to him.
Okay, okay. I admit it. I'm being unnecessarily critical of this Amber chick. Everyone is, in some way, enamored with (of?) Edward. The red-haired secretary over at Forks High, for example, thinks very dirty thoughts about our forever-seventeen year old boy. (By the way, I've only read the first chapter of Dark High Noon. I'll read the rest when Stephenie either a) publishes it or b) calls the project off.)
However, her attitude is a little unnecessary. Sure, Jessica bitches and whines when she first tells Bella about Edward. Sure the hostess 'assessed' Edward right in front of Bella, who could, at that time and place, almost safely be presumed to be his girlfriend. But Amber's behavior was a little over the top. She didn't even look at Bella if it wasn't necessary, and she only technically took Edward's order. Eeesh.
When the movie came out, I had practically forgotten about this insignificant speck of a character. And then I saw her hair.
If you're blind and can't see the growth on this woman's head, I've circled it for you. Wow... After that, the cat guy wasn't all that unexpected. (He's in the background, by the way. He's a little blurry, but I'd recognize that look anywhere.)
In the movie, Amber is played by an actress named Katie Powers. This is irrelevent to what I'm talking about, but I thought I'd mention her. I was looking at her IMDB page -- Everyone and their dead grandmother has one now. -- to see if she kept the freaky do and found her resume interesting. Katie is working in all areas possible. She was a 'logger' on Clean House, a photo double for both Kristen Stewart and Cate Blanchett, and a post-production coordinator for several productions. This chick is really working her butt off to get into Hollywood. I like that.
As for her acting skills, I'd say they were mediocre. That isn't a bad thing because acting is a talent that can always be improved, but she did as well as you'd expect from any extra. I say this as I recall her two lines, but I'm feisty this afternoon, and I need somebody to take it out on.
Back to being on-topic -- I was actually going to make a list of bitchy Ambers from literature and movies/tv, but I can't remember any aside from Amber Brown, and she was pretty cool. But mark my words! The name Amber is default for resentful skank, and it's REALLY unfair!
Edit I JUST remembered one! I remembered somebody singing the name Amber and remembered Amber Von Tussle from Hairspray! See? PROOF!