I don't necessarily have one favorite song, but here are a few I've been listening to lately:

Anytime- Eve 6
Becoming the Bull- Atreyu
You Make Me Sick- Egypt Central
Dig- Incubus
Stillborn- Black Label Society ft. Ozzy Osbourne
Let Go- RED
Breath Into Me- RED
Ooh Ahh- Grits
Themata- Karnivool
Rebirthing- Skillet
Whispers in the Dark- Skillet
Never Even There- 32 Leaves

I enjoy listening to all of Breaking Benjamin's songs.