"When choosing a debug kernel, there are several choices. The HST kernels are "half strict" and do not add much overhead compared to the retail kernel. The AST, or "all strict" kernels contain much more debugging information and are much slower. Most kernel debugging can take place with the HST kernel."
Don't download a Debug kernel (all those ending with a D) unless you really need that capability.
"The liberty of a democracy is not safe if the people tolerate the growth of private power to a point where it becomes stronger than their democratic State itself. That in it's essence, is Fascism - ownership of government by an individual, by a group or by any controlling private power." Franklin Delano Roosevelt, Message proposing the Monopoly Investigation, 1938