On way to greatness

"You could be great, you know, and Slytherin would help you on your way to greatness..." What if Harry had not objected to the Sorting Hat's offer to put him in Slytherin? Would he have been better off? Slytherin!Harry, powerful!Harry - oh, and since someone asked, it's not slash, and it's not going to be, either. It may end up being H/Hr or H/G - I haven't decided yet.