Perfect wood grain!
When do I want it?
When it is convenient. I’ve already waited for 5 years.
What do I look for?
Wood grain. Duh. I’d hope you’d have guessed that by now. What do I mean by that? Well, wood grain should always go the long. Look at the following pieces of wood. 
The top piece is proper. The wood grain goes left to right, following the longest length of wood. On the bottom the wood grain goes up to down, following the shorter length. However, it is not just that. All 4 sides of the main length should follow that pattern. Look at the following image


