Recommending music has never been my forte, mostly because people don't like the same music I like since I tend to listen to the darker shit out there (huge Death Metal Fan but I listen to just about anything as long as it's not country or rap (I make an exception for Eminem)).
That said lately I've been listening to a lot of Korn, Rob Zombie, Scar the Martyr, In Flames, Lacuna Coil (my all time favorite band), Five Finger Death Punch, Lamb of God, Cannibal Corpse (like I said, darker shit), old school Godsmack (don't like their new stuff), Staind, oddly enough Daft Punk, Eminem, and a few other bands. I highly recommend any of the bands I did mention, the ones you haven't heard of check out on Youtube (I will warn Cannibal Corpse is not for everyone, I blame my friend for getting me into them). I'm sure they might have one or two songs you might like.
I do listen to a lot of anime soundtracks (and j-rock) but those are really hard to recommend, especially since it usually takes watching to show to determine whether you'll like the song or not (plus I have so many anime soundtracks on my harddrive I'd have no idea where to start recommending (though any Macross soundtrack is worth listening too, they always have great music (especially 7 and Frontier)).