Flew my first 737-900 yesterday BOS-ATL. Vents are not powerful and screen tilt issue in FC became annoying when person ahead tilted his seat back. Also, where you have to plug in your headset, right at the seatback screen, causes the wire to drag across your food tray..
The FC galley is practically non-existent. Like the fact that it has 20 FC seats. That's a plus.