Undergrad = 1. UT-Austin, skipped class 1/3 of the time, just cramed the night before and graduated with 3.75 GPA. That's how easy B.S molecular bio was.
OSU Pharmacy school: p1 = 3. Still partied every weekend, studied 3 nights a week, 3-4 hours a night. 3.7 GPA
P2 = 8. Wham, it hits you. Forget partying, forget fun; 4 hours per day, 7 days a week + 12 hr/wk work. It was an endless cycle of cram for a test -> take test -> cram for next test. Did manage a 3.9 GPA.
p3 = 6. Finally backed off. 3-4 hours studying a night, 5 days a week. Can worth both days each weekend without feeling burnt out. But can't slack off for more than a day pilling up. 4.0 GPA so far.
Of course, if shooting for a B average, you can cut studying time in half, and shave off 2 points off the stress level.
I know, I know, GPA doesn't matter, but I just hate to lose to my peers. Besides, scholarship money is riding on it -- it's the difference between graduating with $100K in debt or $80K in debt. Of course, it matters a bit for residency as well.