Assumpta is a big-time kneader, especially with me. She has learned exactly where our bladders are and massages them vigorously every morning to let us know it's time for breakfast.
I've tried rolling over so she can only get to my back (hoping for a free massage), but she'll hop down beside me and start kneading sideways to see what vital organs are most tender.
She also does "air muffins," kneading the air when there's nothing there, when she's really blissed out. It's funny to watch the different ways she kneads me, though...sometimes it's very serious, purposeful, whiskers-drooping stuff, and other times, it's like she's doing it for form's sake, but not really paying attention (she'll forget to use both paws and just make little half-hearted movements with one paw, looking around and swiveling her ears).
My favorite posture, though, is "The Paw of Indecision," in which she sits there, with one paw sort of half-raised off the floor, flexing and unflexing it. She always does this when she's not quite sure of what to do next. Turns me into a drooling idiot every time I see it.