Mmmm love curvy gals with far more passion than I can afford or find the time to.
Though ironically my fav position is CG which most curvy gals aren't fond of.. I'm a strong guy and can offer plenty of support where needed.. just love being able to look up and see her face, and occupy both hands on the ass or tits.
Doggy is a close second..loving a nice round ass. Really though any position I'm involved in is fun.
It is a toss up for me, I really like standing missionary off the side of the bed with legs bent way back or doggy with me gently spread her inner thigh outer labia area with inverted hands and fingertips on her inner folds.