Disagree. He wasn't a 'scared little boy' - he was a complete and utter sociopath. Rotten and evil to his core, even if he sometimes was unsure of himself, he had no regard for any person on that show - NO ONE. Talking about cutting Ned Stark's head off with his daughter sitting 5 feet away... tormenting his uncle, killing at will...
I didn't see a single redeeming thing about him, and he was designed that way.
I completely agree with Rob - a scared little boy doesn't take his new crossbow, tie up the prostitute who has been sent to sleep with him and then shoot her full of crossbow bolts.
Now if the scene had been him all nervous about sexuality and exploding in his pants too early, then sure - scared little boy.
Continuing to fire crossbow bolts into a tied-up, naked, defenseless woman whose life you feel holds no value = sociopath.
If you want to be shocked at something, Cersei crying over her sociopathic son's body was interesting - how could she possibly feel anything for that brat at this point? Goes to show that a mother will pretty much forgive her children for doing anything...