My favorites, in order of appearance:
"Fatal" - Even speaking as a predominant rock-listener, this track is still pretty cool. Some people have criticized the movie-audio ("he was born *perfect,* and just like the Great White shark, this guy has never had to evolve!") but I think it adds to the energy of the song pretty nicely. It's obviously written from the perspective of "Drake" (Dracula,) though using a decidedly more urban mode of expression. Its appearance in the movie coincides with Drake's appearance in and subsequent terrorizing of the vampire-memorabilia-shop.
"Daywalkers" - This track was obviously made to be background music. It occurs while Blade is chasing Drake through the city during their first meeting. It sets the mood nicely in the film. IMO, it's good enough to keep, but not the most epic song on the album by any means.
"Party in the Morgue" - For the life of me, I can't remember where in the movie this song occurs. o.O It's a good one, although extremely repetetive. No two-ways about it, I'd get extremely flipping bored if I had to sit down and give this song my full attention just for the sake of listening to it, but it gets by as background music by virtue of its cool, spooky, classic-horror-esque sound effects and stylish techno-appeal. Other than that, this song is pretty much just typical shameless self-promotion of the "look at how rich and renown and influential I am!" sort.
"Skylight" - Now HERE'S a song to which I can really jam-out. It's not rock-heavy, but the pounding, energetic nature of it brings it pretty close. It's great music for a fight scene (and apparently whoever picked it for this movie knew that, because that's exactly for what it's being used therein.) It's also very stylish "chillout" music. It plays during Blade and Abigail's combative entrance to the downtown-Vampire-HQ where Drake is holding Zoey Sommerfield hostage, and Danica, Asher and Jarko are interrogating King.
"Black Lab" - Plays during the suit-up and subsequent motorcycle-ride to the Vampire stronghold. This track features some *awesome* rock guitars, and the vocals really get you revved-up. It would be good music for a fitness montage (or just for listening in your headphones at the gym.) It's pretty steady in its tempo and energy. It doesn't really "go anywhere," but it also really doesn't need to.
"Weapons of Mass-Distortion" - Yes, I'm using the alternate name for this song. It just sounds cooler. Anyway, I would call this track without question the BEST song on this album. It's got style as well as edge. I've heard a lot of people speculate about what's being screamed nondistinctly into the microphone on this track, but I honestly think it's supposed to just be really aggressive-sounging nonsense. It's just being conveyed with such style and purpose that most people's natural assumption will be that there's supposed to be an actual meaning behind it. Also if I told you what the "words" sound like to me, it would probably ruin the song for you. XD
"Hard Wax" - Once again, no shortage of style or energy. This is one of those tracks that doesn't make my "instant classics" list by any means at all, but is still definitely worth keeping and one of the better songs on the album. It features electronic synth sounds with heavy drums and bass that get you amped. It's good dance music, and once again, serves its purpose in adding some further excitement to the combat scenes near the end of the movie.