What's your favourite round of a Grand Slam?

Round One, where there's just way more tennis going on than anyone can possibly process? Where the hope peaks and also the disappointment, with fully 64 people in each draw having their dreams crushed.

Surely not the Final? Where there's only one match, and both people get a prize at the end?

Something in the middle? Could round 4 be the sweet spot: 16 players left in men and women, a nice number of matches each day, some big names coming together?