[nologic01]

I think the answer depends what kind of site you are targeting. For a clean and simple text blog it may actually be optimal to build something from scratch using building blocks you know well.

But for a larger site that might evolve and get more complex over time the DIY approach will likely hit the reinventing-the-wheel dilemma multiple times.

Its better to figure out which of the existing SSG's has a programming model that fits your brain and simply learn it well so that you can extend it in any which way you like.

As a bonus, instead of yet another half baked ssg, you can contribute something back in terms of plugins, themes or other code and feel good about yourself.