Auto unmount after some time of inactivity
TrueCrypt has an interesting option which consists in auto unmount virtual disks if they haven't been used/accessed during a specific period of time, for example when you go for having lunch or when you left the office for go home.
Due to security reasons it would be very interesting to implement the same functionality in BoxCryptor for its virtual disks.
This is already another request with about 80 votes. Look for "Auto un-mount on screen lock" and move your votes over there!