Hashirama was an excitable man with a boisterous personality. He loved meeting new people, having friendly competitions, and gambling. Headstrong and often impulsive, it fell to others such as his brother. Despite the first impression he may give, Hashirama was capable of being serious when it came to matters that were important to him.
The Uchiha were known for having an innate aptitude for all combat oriented skills and an advanced growth rate. They also have an especially potent chakra quality as well as a natural affinity for the fire nature transformation. This clan's badass doujutsu is the sharingan the Uchiha are powerful, strong & blessed with talent.
If you were lucky, during your school years you had a teacher who was cool and understanding. The kind of guy you'd go grab beers with after you graduated college. That's what Kakashi was, and throughout the series he served as counselor to many other characters when they were going through tough times. He's the kind of teacher everyone wishes they had; smart, relatable, chill, and utterly devoted to his students. One of the big ironies of the Kakashi character is that although he's called the copy ninja, he's actually got more unique elements than most of Naruto's main cast, and is far from the Goku clone that Naruto is. In Kakashi we see much of Kishimoto's true creativity, and the epitome of his talent.