I've had the rather interesting experiences of pulling 5Gs in a human centrifuge, and 2Gs (and 0!) in a parabolic flight, both within about a week of each other. I noticed that after those two experiences I became much more sensitive to the subtle changes in G forces that take place over the course of a normal flight, and my crappy estimating skills would peg the max I've felt in a commercial flight at about 1.25-1.4G