Right in the center of Main St, just before the actual hub!! I actually just happened to end up there one night just as the fireworks started. It was a terrrific spot. Only bad thing was when a dad in front of me put his child up on his shoulders. You should have heard the shouting going on then....'hey, down in front, hey, get that kid down, we can't see!'...too funny. Or the woman who kept putting her camera up, over her head, right in front of mine. She didn't much care that she ruined shots for about 6 other people around her that night!!!
But, if I could be there, all by myself, or be able to pick 50 people to watch with me...that spot would be perfect. I do love watching from the bridge and have Tink fly right over me, but you don't get the same effect as being dead center, in front of the Castle.