Where do I Start Part II?

Assuming you know which end is further upwind and is favored, now which side of the race course is your preferred choice. Maybe there is more wind on the left, maybe the wind direction is steadily  shifting toward the right (persistent shift), maybe the wind is changing back and forth (oscillating shifts)? All things to consider and determine prior to your start. Relative to the favored end of the line, these factors may have a greater impact on the end of the line that is favored. Unless it is an amazingly short course, this is probably true. If the left or right side of the course is favored then you want to position yourself at the start to make certain you can get to that side. If the shifts are oscillating, then start more in the middle away from the congestion and begin sailing the shifts and remembering your race is against the wind, not necessarily the other boats.