What's your Main?

This is a question I get asked alot, what's my main, class, level, professions. Fine. How do you tell which IS the main and which the alts.

What's a "Main" ?

Wowwiki Definition:
Refers to a player's primary player character. Sometimes this is the first character the player created and played, but often it is not. A player's main is usually the one that has seen the most play time and investment of resources and usually is the highest level out of any other Alts. In addition to their main, many players have one or more alts.

Sleepy Priest Definition:
This main would be the character that you most identify with, supplies your other toons with gold, enchants, and anything it needs.

So keep this in mind next time someone asks what's your main?