Hello there, nice cat pix! =D
I like the expression of no.1, and incidentally i like this pic the most from your series.
The pictures seem a lil overcontrasty for my taste, esp pic no.2 which was too saturated to my eyes.
Pic 3 is nice, but I'd rather the cat wasn't blocked by the bar as the bar is rather distracting. Lovely green eyes though! =)
Pic 4 and 6 are nice, though still a lil too contrasty for my tastes.
Picture 5 is a little wasted IMHO, because the red distracts my eye from the cat. Try going a little closer and exclude the red from the picture.
My two cents ^_^
Cheers!
QX