OK, I was petting my kitty yesterday and she purred very loudly (making me very happy with myself). Anyway, as she purred, she would expand her claws out and pull them back in. Sorry, can't describe it well, she'd push her claws out, pull them in, and sort of knead the carpet. Her tail thrashed side to side very fast. Never had this happen, usually cat purrs for a few minutes and then leaves. But my cat (Minnie) was totally thriving for my attention (I think...) She also rubbed her head against my legs and chest and would circle me. I'm thinking she was really happy! Right?