I actually feel pretty good that I don't seem to have a favorite! We have two cats...one I raised from a kitten and she's 15. The other my husband brought with him when we married last year. She's 12. It would be easy for "mine" to be my favorite and "his" to be his favorite. Although we each defended our own at the beginning of our marriage, when things with the girls were pretty rough, we have each made an effort to love on the other one as much as possible. This is way easier with my hubby's cat, as she is very demonstrative and rather an attention hog.
My girl doesn't like outward shows of affection (doesn't want to be picked up, rarely sits on our laps, etc.) I LOVE how my hubby's girl like to jump into my lap and snuggle me, purring loudly. And it would have been easy for me to soak that all up and look at my moody girl as not as loving. But the fact remains that, like pugkjj, my girl has been through SO MUCH with me, and for many years SHE was my only affection. She was loyal and faithful and true. How do you forget that just because her personality differs from someone more outgoing and able to tolerate attention??! So, I love each of them for who each is, and I give and get attention from each as fits her personality. Someday I think I will put my time with Tia ("my girl"), and what she has taught me about interaction, down on paper. She has taught me so much about how to interact with others!!!!