I'm not sure what you mean by this. To elaborate on why high sharpe is important to me: it is because sharpe indicates statistical significance of my edge(s). Especially if the edge is developed through data mining instead of some kind of fundamental economic analysis, you need a way of having confidence in the pattern. It is similar to a scientist looking for a p-value below a certain threshold. Without a high sharpe, a backtest is about as useful all those studies that say chocolate reduces your risk of cancer, while the other half of studies found the opposite.
Sharpe > 3 usually trades a lot. How do you control the costs of trading? Are you an exchange member? If you have such a high sharpe, you should join a hedge fund and make millions.
) did you make most of your money in a few big up days? Would be interesting to see the equity curve.