Post Processing. Photoshop, Lightroom etc

Nice pic, but your composition is kinda out, leave so much head space for what?

Nice shot nevertheless

Picture #1: Editted abit too much, too much contrast lol
Picture #2: Underexpose
Picture #3, 4, 5: Nice!

But as zstan said, try to take from the front view with her looking. Dont snipe her candid

@ DJFoo: Actually your shot without the contrast PP, is nicer lol. But the pic is somewhat yellow/orange/red. White Balance problem, try to set to SLIGHTLY blue-er or add some Magenta, but dont add more than 10 on each bar.

Your #7 is nice also, not bad!

Actually your shots are good already, just need abit more knowledge on PP.

Dont contrast too much, it's obvious

Your pop up flash abit too harsh, make them look burnt/washed out

But your Avira shot is not too bad

You should build a pop up flash diffuser, use tissue paper also can.

So their skintone wont look so harsh/washed out.

If you're using kit lens, try shoot at 18mm, then slowly crop, like that at least you get f3.5

Nice shot DJFoo! Just that not sharp enough.

Improper focus, you focus between her neck and the lip area instead of the face.

But good try

You should set Manual AF Point Selection.

Select the AF point yourself.

Single Shot AF = 1 Shot.

Continuous Shot AF = Burst mode.

It doesnt affect your Focus point, I think since you shot her photo potrait style, should've set the AF point on the right (which comes out to focusing her face during potrait mode)