Thanks D-B-J for tips! With direct flash they look kind of weird. My aim is take picture as natural possible as the look & without using any photo editing software.
Btw, may I know if you've similar problem like my D7000:
http://www.thephotoforum.com/forum/nikon/254218-d7000-mechanical-sound.html
Well, i guess i would ask you how did you managed to clean these images so much, i mean i don't see any noise in these images. With my canon 40d i can't get such clean images, or i still need a mentor to guide me ... please if you could tell me?