What I think of a songs attitude would be like you have and annoying sibling that wants you to play and you need to practice guitar.
First time They ask play you kindly reply, "sorry I'm busy"
The second time You say. a little louder, "I'm busy."
The third time you are up-set and scream, "I told you I'm busy"
Look up voice, tempo and dynamics

Terms can be found here
http://en.wikipedia.org/wiki/List_of_Italian_musical_terms_used_in_English#Voices
Keep working at it, you'll get it