My favorite band(s) are Evanescence and Sick Puppies. For their sound and lyrics.

Um, I have a few favorite songs:
"Demolition Lovers" - My Chemical Romance
"Hello," "Missing," "Lithium" - Evanescence
"All The Same," "The Bottom," "Anywhere But Here" - Sick Puppies
"Anything Can Happen In The Next Half Hour..." - Enter Shikari
"Reduced to Teeth," "What It Is To Burn," "Bitemarks and Bloodstains" - Finch
"Kennedy" - Kill Hannah
"Given Up" - Linkin Park

...Just a handful of favorite songs. I'll stop before I bore you all to death.

And for my favorite artist, I'll just say Amy Lee.