I was just thinking about this when deciding which
soda to buy the other day when the store didn't have the one I'd planned to get.
Apparently I come from an area that's 4:1 pop in favour of soda, I went to college in an area that was split 50:50 Coke:Soda, and I live in an area that's 50:50 soda

op. I first started semi-regularly drinking soda in college, so that's where I probably picked it up.
I agree that "Tsst!" is accurate when opening a can, but "pop" is closer if you are popping off a bottle cap. I drink more bottled than canned soda (not a whole lot overall, either way), but still call it soda.
Other fine names missing from the options include the old-fashioned
phosphates, the pretentious (and allegedly popular at Duke, according to a previous thread)
San Pellegrino, the classic
soda pop (which I saw legitimately used earlier this week),
carbonated beverages (which I occasionally use when intentionally referring to the carbonation),
soft drinks (which I might use when ordering at a restaurant), and John Sculley's famous
sugared water.