Damn Emily, just reading why you like that position made my pants fit funny.
All time favorite is 69 because in my experience it's the only guaranteed way for me to get a chick off lol.
For PIV sex though it's mish with the chick's knees to her shoulders or if she's flexible enough her ankles behind her head. I like it because it lets me go deeper, hit the g spot more by just raising her hips a bit, you can do the hard and fast animalistic pounding or you can do slow deep strokes. It's an easy position for kisses and if you have a great connection/chemistry with the person then you can look into each others eyes and give the session that extra something.