Having lots of room to move about on the C-17 made it lots better, after takeoff we would go and find a place to sleep. (when we went our 23 man unit took the entire plane).
For that particular best/worst flight in a C-130 the payload was:
Airfield Engineers, 2 of.
Toyota Landcruiser Troopcarrier, 1 of
so plenty of room to stretch out on the web-seating.
However, I know what you mean by squeezy. I have been on a 7 hour C-130 flight where we have been packed in like sardines with a bunch of grunts. Trying to get to the pisser-a-phone was not much fun (climbing over the top of sleeping grunts without waking them up).
As an old Warrant Officer Loadmaster once told me - if there is an emergency, do not bother going after one of the two parachutes that are mounted on the interior wall of the C-130, go for the fire axe, because he who owns the fire axe owns the parachutes >:D