This is just my 2 cents.
The sepia photo looks washed out. I think B&W might look better.
The second photo with the little girl in it. I would say take some off the right. If your able to maybe add some on the left so her arm isn't cut off.
For the third photo you might want to add alittle more space on the right. It's pretty tight.
I'm sure I'm missing stuff but I'm sure there is others on here that can add more.
By the way I really like the shot with the little girl in it. To me that photo just screams B&W but thats just me.