I'm on the first floor of McKay this year, room #1. I snuck into McKay on Tuesday after my volunteering and checked out my room. It's right, and I mean right, beside the front door to your left. I'm sandwiched between the staircase and the common room.
Oh well. I hope everyone comes to say hi, I'll probably be hanging around the front of the building most of the time!
Edit: Sorry, I thought you asked which room am I in. Haha, I feel embarrassed now....I'm working too hard....