1. Something badass. You need a song that is going to alert the pitcher that his worst nightmare just stepped into the box. Something that will strike fear into the opponents heart. Don't underestimate this part of the game. You need a song that's going to make you feel like you're 10ft tall if you're going to face a nasty back-door breaking ball.
2. Crowd involvement. You're in Turner field. The Braves are down by 1 and there's a man on base, suddenly, Ozzy Osbourne comes blaring through the speakers "Alllllll aboooooaaard ha ha ha ha!!" and "Crazy Train" kicks in. You know what's coming. Chipper Jones is up to bat. The crowd is on their feet, everyone is going nuts. The local hero is up to the plate, and the pitcher is squirming. A crowd that was dead a minute ago just came to life, and all because of Ozzy. Good walk-in music gets people on their feet and brings the stadium to life.
3. Originality. Part of the reason the "Crazy Train" moment works is because that song has become synonymous with Chipper Jones. A good walk-in song is specific to the player, and when the song comes on, everyone in the stands should know who is stepping up to the plate. So now that we broke that down, let's take a look at some my personal favorites: (Note: this isn't necessarily a judgment on song quality, but a judgment on how the song works as a walk-in song. There are a lot of good songs that make terrible walk-in music.)
Rage Against the Machine- Bulls on Parade. Even as Kelly Johnson's batting average dipped below .200, I still defended him. Why? Because he used Bulls on Parade as his walk-in music. To this day I still think it's the best walk-in song I've heard. It's super aggresive, badass and gets everyone pumped up. The "Go with it now!" opening makes it a perfect walk-in song. By the way, when Kelly changed from Bulls on Parade to The Outfields "Your Love" I was screaming for him to be traded. That's on the wall of shame for walk-in music.
Alice in Chains- Man in the Box. The opening riff is a monster. Plus the "singing over the guitar" part makes this one instantly recognizable and undeniably awesome. If you want a song that will scare small children, this might be it.
50 Cent- In the Club. An instant crowd pleaser. Not as in your face as some of the rock songs, but it gets everyone on their feet.
Green Day- Brain Stew. Long before Green Day made really bad pop-rock songs about the post-apocalyptic world, they were a punk rock band. And while Billy Joe Armstrong may be on the short list for "Famous Guitarists Who Barely Know How to Hold a Guitar Correctly" Brain Stew is awesome. It's a little slow for a walk-in, but it would definitely strike fear into the hearts opposing pitchers.
I'm sure there are others that I'm missing, but those are probably my top 4. FYI, if you think of one you could post it in the comments. It is legal to comment on the blog. You will not be punished for it, I promise.