I can't remember who wrote on this site to throw away the ruler before designing a boat, and I like this one as an example of that: almost straight lines, but just the faintest bit of curvature changes what could be an ugly box into an elegant beauty. It does not take much, but that little bit changes everything. With those subtle curves, the fully angular flat plate glass pilot house is that bit of contrast that causes the eye to not look away.
Thanks; design secret is: if line is long and straight, make it slightly curved. Shot lines can be exactly straight.