Nikon 35mm f/1.8 AF-S for everyday portraits (http://t-it.us/ADNikon35mm18) nd 50mm f/1.8 for studio when I don't shoot against white backdrops (http://t-it.us/ADNikon50mm18). The 50mm f/1.8 won't work on D3000 series or D5000, so you should get the AF-S version - http://t-it.us/ADNikon50mm18DX. If you can afford it, the Nikon 85mm f/1.4 is fantastic, and the Canon 85mm f/1.2 is divine ;)