I'm very keen on the etymology of Biblical words and expressions and linguistic analysis. The closer I can get to the original expressions and words used by those inspired to pen the scriptures, the closer I can get to hearing what the Auther of the Bible really said. Sometimes I think there is too much emotionalism in religion today that clouds the messages, Peter made this mistake until Jesus told him straightly. The quicker an application takes me to a reliable explanation to help me see connections is what makes me the happiest.
I have many volumes of books on my bookshelves for Bible reasonings.