When I first saw this thread, I thought it was a joke or a trap question.
Then I realized that not all know the maxim of most naval architects. Give the same other parameters, a longer boat is faster.
My 19 foot Westside Wave Exceed is the fastest boat on the Hillsborough River 364 days of the year. That other day is a race on that river.
However, if you can’t get comfortable in a long, skinny boat, the boat you are most comfortable in will be the fastest for you.