Who was the most unpredictable character on How I Met Your Mother?

How I Met Your Mother was a popular American TV sitcom that aired from 2005 to 2014, and during its nine-year run, it had plenty of memorable characters. However, when it comes to the most unpredictable character, it has to be Barney Stinson, played by Neil Patrick Harris.

Barney was known for his flashy suits, catchphrases, and womanizing ways, but he was also incredibly unpredictable. He was always coming up with elaborate schemes and plans, and it was never clear what he would do next. From his obsession with the game show 'The Price is Right' to his complex playbook of pick-up techniques, Barney kept both his friends and viewers on their toes.

What made Barney even more unpredictable was his backstory. As the show progressed, we learned more about his past, including his traumatic relationship with his father and his search for his real father. These storylines added depth to the character and made him even more fascinating.