What's the role of your life?

Have you ever noticed there are some actors who, no matter what they do, will always be associated with a role they have played in a specific movie?

Examples:
1. Kevin Costner = Lt. Dunbar
2. James Earl Jones = Darth Vader
3. Colin Firth = Fitzwilliam Darcy
4. Charlton Heston = Judah Ben Hur

It's hard to say why it is. Perhaps because the role is one that shows their complete essence. I don't know. But it makes me think . . .

Is there something in my life that will always be how someone thinks of me. Is there something that shows my complete essence?

Perception . . . it's an interesting concept.