Direction of Light

So I've been taking most of my protraits with my big windows at the side and a reflector on the other side but I've been reading lately that with portraits, a nice shot is with the subject facing the window and a reflector underneath to shoot up some fill lights.

I went back and looked at a few of the photos I took of S on my kitchen table, which is right in front of a big window and I realized that I do love the lighting and catchlights in her eyes.  I'm going to be shooting two children this week so I'm thinking I'll have to try this out again with them and see how it goes.

The picture below was taken on my table, facing the window with a black sheet behind her.