As everyone else has said. I took me ages being a glider jock to get it into my head that a sucessful field landing in a powered aircraft is one where you and the passengers walk away unhurt; whereas a field landing in a glider is just a normal landing where any damage to the glider is bad news.
I was always trying to do a 'glider' field landing when I first started doing PFL's instead of looking at maximising the chances of being unhurt and sod the aeroplane.