I really like the colours and feel of these shots - especially the first two - throw in some snow and they would have that really christmassy feel to them!
however the most impressive has to be number 5 - brilliantly sharp and detailed you got all the details of the small bird in - not an easy thing to do!
They are all good. Two is my favorite because I know how hard it is to get a perfect exposure on the black head of a chickadee. Five is awesome, but the bird is shifted over a little too far for me. Maybe a cropping would help that out.