My Thai partner Wai to me with her head slightly forward, the kids incline their heads more. We all Wai to monks, we all incline our heads more when paying respect to the Buddha, his teachings and taking sanctuary in him through a visual representation of him.
We also always try and turn away from Buddha images with our right side to the Buddha.
This will give some context the the customs of how this fits in to SE Asian society. http://en.wikipedia.org/wiki/Thai_greeting
Keeping the Buddha on the right side was a custom practised during the time of the Buddha.
"Knowing the Blessed One's consent, the devotees of Pataligama rose from their seats, respectfully saluted him, and keeping their right sides towards him, departed for the council hall." ~ from Maha Parinibbana sutta
"Then the brahmans & householders of Thullakotthita, having been instructed, urged, roused, & encouraged by the Blessed One's talk on Dhamma, delighted & rejoiced in his words. Rising from their seats, bowing down to him, they left, keeping him on their right." - Ratthapala sutta