Why do you capitalize some words that normally aren't capitalized?
Usually for clarity. For instance, we use the capitalized term "Vampire" to distinguish ourselves from the mythical vampire while still emphasizing that we are the source of the latter. Most of our unusual capitalization should be read this way, as an indication of metaphor.
The one exception is in our use of capitalization when referring to Those Who have achieved the Vampiric Condition. We capitalize references to these Elders out of respect.