I have some previous material about were to start on the line. Probably worth another note.
At the boat end you can always tack out for free air or to go to the right.
At the pin end, if the line is square, you have free air. It is the only spot, if the line is full, with free air. Everyone else will be getting back wind or suffering from a lee bow person just below them. The bad thing is that you are stuck for a little while on starboard going left. The place to be if you want to go left.
In the middle there is usually a sag. Not as crowded. So you have a better chance of getting a good run at the line and speed at the start. You will have a little better chance of getting over to port tack than the people near the pin.
Often the conservative start is toward the middle from the favored end.
A lot is going to depend on your boat handling. Can you stop? Can you hold your position? Can you get going at full speed quick? Can you time the whole thing so you are at the line at full speed at the start?
If you start late? Maybe best at the boat, but get going as soon as you can.
My Name is Tillerman and I am an Aerobian
11 months ago