I think that last image is more interesting because of that angle and that the focus was closer... so it made you have to consider what to focus on as the image leads your eyes forward into the frame.

Mastering the focus is a neverending endeavor. I think controlling the focus to be clear where you want it to be is probably the most important thing a photographer can learn. I find it more difficult with digital equipment to control the focus when your camera wants it to be somewhere else. But then again i don't have the best equipment either! hahaha

Keep up the great work and i think you did very well with these.
Cheers