[TorqueDog]

-For the letter "Z", do you say "Zee" or "Zed?"
I'm guilty of using both depending on what I'm talking about. Same as using different pronunciations for the word route / router (root or rowte) depending on the context.

-For the word "bag", do you say "Bahg" or "Bayg"? (This is by far the biggest one, as it affects the pronunciation of words like dragon, wagon, flag, leg, etc)
Bayg.

-For school, do you say "grades" or "marks"?
Both? They're interchangeable.

-For "sorry", do you say "sawry" or "soary"?
Soary.

-For "drama", do you say "drahma" or "drawma"?
Depends. Long A sound for 'drama', short A sound for 'dramatics'.

-Do you say "dinner" or "supper"?
Dinner.

-Do you say "coke", "soda", or "pop"?
Coke if it's a Coca-Cola, soda is my short-hand for 'Club Soda', and pop for generic fizzy drinks like Pepsi, 7-Up, etc.

-Do you say "candy bar" or "chocolate bar"?
Chocolate bar.