I can purchase about $20 worth of blackout paper blinds to cover them. But it won't be possible to open those blinds on rainy days or at night when I would like to enjoy the ceiling windows (it's that pesky gravity thing, the blinds will have to be taped down).
The other unexpected thing I've encountered is the echo in here. When I make business calls, people can here my voice echo. What can I say? My office is extra big with vaulted ceilings and skylights. I can live with the echo though.