I'd say to each his own and (of course within the bounds of local laws/requirements) there is really no right or wrong spot, it depends on what you as the owner do, like and are comfortable with.
I have a 265 Express, growing up, the names always went on the transom with the hailing port below.
Certainly doable but not exactly readable with 2 ponies hanging off my stern? So, we hemmed and hawed and opted for 8 inch bolded letters, Arial with a forward slant (boat name is EPPE), that we placed on each side of boat, aft, near where it says Grady White - clean, subtle and looks good. Best part is with the vinyl lettershops producing the stuff, its easy as heck to design, order and install yourself. We put ours on in 2007 and is just about beat up enough from (fishing, docking, etc) that its time to replace. I will see if I can find a photo in my pc when I get to work. I live in CT and fish in the LIS mostly. Being a small state, hailing port not as much as important to me but the boat in registered and does have CT in the #s up on the bow.
I think if you have a large name, with a big decal (which I think looks cool on the right boat with the right artwork), then you go mid ship.