We use to buy every single picture...now we do the same as Earl...we buy the embarkation photo only.
For example: On our last cruise we were hurried, tired and struggling with our two carry-ons, my purse and our coats, but we stopped for the embarkation photo anyway, and we're soooo glad we did. The photo captured that moment on embarkation of mixed emotion on our faces, of "we're so tired and yet so happy to FINALLY be here". We just love it and are so glad we stopped to take it.