So in Shogun 2, what do you guys typically research first? What are the key arts?

Personally I find that I need Markets first, but then I try to rush for "Heaven and Earth" ASAP - +50% bow ammo and +5% replenishment to troops, and enables Encampments. Replenishment is such a key factor, it's vital to get it high early. And having lots of arrows is the most important factor in siege defense early on.

But then I go back to the Chi side for better roads, Sake dens, better farms, etc.

I almost never research much of the other Bushido arts, mainly because I can just capture buildings and use those instead. Researching the art and then spending a lot of money to build a building to get a single type of Samurai? No way, just give me more ashigaru every time.

What do you do?