I've seen this done with various TV shows, but never Greys Anatomy, so I decided to take on the daunting task.
Engineering
"Oh, screw beautiful! I'm Brilliant! If you want to appease me, compliment my brain!" - Christina Yang
Pre-Law
"Just because people do horrible things, it doesn't always mean they're horrible people." - Izzie Stevens
Women's Studies
" I am woman. Hear me Roar. " - Miranda Bailey
Psychology
"Being aware of your crap and actually overcoming your crap are two very different things." - Christina Yang
Philosophy
"The future is the home of our deepest fears and our wildest hopes." - Owen Hunt
Undeclared
"We're adults. When did that happen. How do we make it stop? " - Meredith Grey
Pre-Med
" It's a beautiful day to save lives " - Derek Sheperd
Dance
" Shut up. Dance it out. " - Christina Yang
Math
" The carousel never stops turning, you can never get off." - Ellis Grey
Science
"Knowing is better than wondering. Waking is better than sleeping, and even the biggest failure, even the worst, beats the hell out of never trying." —Meredith Grey
Education
"Some days the whole world seems upside down. And then somehow, improbably, and when you least expect it, the world rights itself again." - Meredith Grey