One thing that has had impressed me the most about Sherlock Holmes is his uncanny power of observation, especially after having encountered the classic, The Hounds of Baskerville, for the first time  back in the days when I was a secondary school student.

THE POWER OF OBSERVATION

Sherlock Holmes and Dr. Watson went on a camping trip.

After a good meal and a bottle of wine, they lay down for the night and were soon fast asleep.

Some hours later, Holmes woke up and nudged his faithful friend, "Watson, look up and tell me what you see."
Watson replied, "I see millions and millions of stars."

Holmes asked, "What does that tell you?"

Watson pondered for a minute. "Astronomically, it tells me that there are millions of galaxies and potentially billions of planets. Astrologically, I observe that Saturn is in Leo. Horologically, I deduce that the time is approximately a quarter past three. Theologically, I can see that God is all-powerful and that we are small and insignificant. Meteorologically, I suspect that we will have a beautiful day tomorrow. Why, what does it tell you?"
 
Holmes was silent for a minute, then spoke. "Watson, you idiot. Some jerk has stolen our tent."