No way I could list all my favorite Christian bands but I'll list what I can remember right now.
This is in no special order.
Foreverlin - There new track, Long Lost, is awesome!
The Devil Wears Prada - Especially Danger: Wildman.
Skillet - Anything by them.
Anberlin - I like mellow stuff too.
Attack Attack! - Extreme creative.
Relient K - And I really like that they do Christmas music too.
August Burns Red - Carol of the Bells was amazing!
Amongst the Ruin - Not sure what happened with them but they did some really cool stuff.
Switchfoot - This totally is one of my favorite Christian bands.
7eventh Time Down - Very cool!
The Protest - Another one of my total favorites!
MxPx
The Letter Black
We As Human - Awesome!
Decyfer Down
Red - Amazing!
Wolves at the Gate
Random Hero
Thousand Foot Crutch
I just know I left a lot out.
The album I've been all over recently is Attack Attack!, This Means War!
I can't hear the track, The Motivation, enough. My favorite track from their album, Someday Came Suddenly, is Dr. Shavargo Pt. 3. It's amazing! I really wish they hadn't broke up.