Anyone who has had to wake up for registration knows how absolutely miserable the process it is. You roll out of bed at 6:05 after you snooze through roughly 20 alarms set at 5 minute increments. You go into panic mode when you realize you can't find your sheet from advisement appointment with your RAN. You finally track down your sheet, wait 30 minutes for WINGS to load, and start going into the registration process.
The night before all of this, you meticulously plan out every class you want with the right teacher and the right time. "Of course I'll be the only one who will want a 2:30 MW class with 4 seats left out of 500," you tell yourself.
Unfortunately, it's not actually a thing. Everyone wants that class so now you are stuck in 1 of your 5 "perfect classes" and are scrambling to avoid getting stuck with an 8 am MWF class with an extremely strict attendance policy and an extremely boring topic like Legal Analysis of Purple Spotted Tree Frogs. You manage to fill up a 12-hour schedule so you can still qualify as a full-time student and have class from 8 am until 10 pm Monday through Friday.
You roll back to sleep after accepting your fate of working on your schedule every morning in the offices of your dream professors during Drop/Add week.