Generally somewhere in the 45-60 minute range for deco, occasionally around 90, a couple close to two hours. I've got a couple of dives planned that'll involve 3 hours + deco, but they won't happen until all the logistics fall into place...
Time just... Passes, usually. Dicking about with team-mates, conversations in sign language, daydreaming, looking at the pretty fishes if we're decoing up the reef. All that slide-and-pause stuff early in the ascent is so frantic, it's usually a relief to get to the longer stops and just zone out.
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