My C&C would be... (bearing in mind I know nothing)
1) Slight camera shake, you can see on some of the lashes there are artefacts (if thats the correct term). As well, the line between the colour and the black and white it quite definitive and not as smooth as it could be. Try feathering it in LR3?
2) Like the colour of the grass but the subject is a bit bland.
3) Love the picture. The only thing that spoils it for me is the telephone/electric wire in the top right. That is not your fault as such its just some things we have to put up with. Maybe try cloning it out? (actually on second thoughts that might be very difficult).
4) Nice photo, not much more to say.
5, 6, 7, 8) Don't really do much for me. 6 is the best out of the four. 7 is quite noisy/grainy (maybe too much for the type of shot). 8 looks a bit flat (if thats the correct term).
I say all this and will remind you once again that i know nothing

haha....
The main thing is you got some shots