What position do you enjoy the most?  
Call me old fashion, but I enjoy missionary with a pillow under her ass while both hands are grabbing her ass and pulling it up to meet my every stroke.  Pounding her fast and deep until we both cum while kissing her deep is a big plus.

I am a doggie guy, grabbing those hips and pounding her hard. Mission is good too,  I would rather have her grabbing my ass and grinding hard in unison with my thrusts. I don't think I have ever had a position I didn't like.

Nothing like a petite lady riding you cowgirl.  This leave her and your hands free to explore.  Pull her close to you for some kissing and start pounding away.

Ass up, face on the pillow!
But even more so on my knees in front of a mirror...ya know.. hehe

I don't know. But you on your knees in front of me sounds like a great position to me.