Re-Watchers: Who are you waiting for?

When re-watching Grey's, who are you waiting for/excited to see you again?

I'm on my like 4th or 5th rewatch. For this watch, I am only watching until Cristina leaves in S10. Those are the best years imo. However, I also noticed myself waiting at every turn for the moment in S2 when Mark arrives. I've never thought of him as my favorite character or anything, but he brings an amazing amount of charisma and comedic relief to the show.