I like videos were you can see someone is really in to what they are doing.
So do what you find most arousing yourself, I like to see you having fun. And be yourself, there is already enough acting out there.
I get really turned on seeing pee accidents, were girls really hold it untill they seriously wet themselves. And not standing in the bathtub, but while walking back to their car, or just doing something in the garden. Specially when it is, or looks genuine. Those are rare.