Poirot — Agatha Christie's

Despite his popularity, Christie privately found Poirot "insufferable" and "tiresome" in her later years.

The ITV series starring is widely considered the definitive portrayal of the character. Longevity: Ran for 13 seasons over 25 years. Agatha Christie's Poirot

Always immaculately dressed; obsessed with his perfectly waxed mustache. Despite his popularity

Carries a pocket watch and values absolute precision. Agatha Christie's Poirot

Adapted every major Christie story featuring Poirot.