Seriously though, it is a decent question! I mean trailers are pretty much what hype you up and give you just enough, or in the case of some, too much anticipation.
My personal favourite is the 300 trailer, I'm on the fence of which one of the two I like the more, the one with that awesome "Then we will fight in the shade" quote or that one... even toss. I suppose the swing vote there was the Halo 300 trailer, which was brilliant. A series of clips from various Halo 2/3 and Halo Wars preview vids with the audio from that linked trailer there in the background.
You can still watch it if you mute the volume on the Halo 300 vid and then start the other trailer I linked, waiting until the music starts to start playing the Halo 300 vid, still awesome just convoluted.
My personal favourite is the 300 trailer, I'm on the fence of which one of the two I like the more, the one with that awesome "Then we will fight in the shade" quote or that one... even toss. I suppose the swing vote there was the Halo 300 trailer, which was brilliant. A series of clips from various Halo 2/3 and Halo Wars preview vids with the audio from that linked trailer there in the background.
You can still watch it if you mute the volume on the Halo 300 vid and then start the other trailer I linked, waiting until the music starts to start playing the Halo 300 vid, still awesome just convoluted.