1. breaking dawn (i have no idea why so many people had a problem with it. it was amazing)
2. twilight (had the best edward and bella bedroom scenes. although i love all of their bedroom scenes)
3. eclipse (great edward and bella romance, plus things looking up with rose. only bad thing was...wanna guess? JACOB)
4. new moon (no edward, no cullens for the majority of the book. so boring i had to skip a couple chapters in the middle. it gets good when alice comes back and they go to italy. LOVE that part)

I loved them all for different reasons. But Twilight was my favourite out of them all. But I agree with spikes_girl with some things.

gotta be eclipse........only coz jasper becomes more involved lol..
then breaking dawn, twilight and new moon - though the werewolf part waz awsome....lol

this is the first so it's my favorite :)

The only reason I love Eclipse is because of the Jasper and Alice. Other than that, it was the stupidest book I've ever read, except for Breaking Dawn. Because that book takes the cake.
Twilight was the best because it was the story of the two falling in love, it wasn't ridiculous wars and over-protective glittering vampires. Plus, it was very gripping and a beautiful love tale. New Moon was also great because it was Bella without Edward. It was a look at characters without having their true loves with them.

i love all of them
in this order
1.twilight
2.eclispe
3.breaking dawn
4.new moon