Joe.My.God posted this neat map, which shows how people in different parts of the country refer to our favorite fizzy carbonated beverages. Pennsylvania, where I grew up, is split - people in Western PA (Pittsburgh) say "pop", but people in Central PA (where I'm from) and Eastern PA (Philadelphia) say "soda". We also call it "soda" in New York. Click on the map to enlarge.
Tell me what you call 'soft drinks' in the comments...