Hi Aero,
The pics seem soft. Not sure if it is due to photobucket's image compression.
For #1 and #2, the main background is the glass tiles.
At #1, you could have composed abit more to the right so that the unwanted left edges are not shown in the frame. Sometimes I might missed this out during the shoot too but this is where post editing comes into play.
For #2, you got the tiles filled up the frame. Just need some adjustments to straighten them using image editors.
For head shots like #4 and #5 I would prefer a slightly lower composition.