Heres a couple of things that may help make them even nicer than they are
First...some of the nails go slightly Egyptian hattish (though sometimes the angle of the camera can make this worse than it actually is) instead of going a little wider... bring them in a little like this:
Another thing that can help out is the placement of your apex. Here it is a little too far forward and gives the nail a slight top heavy appearance:
Something like this (though the angle of the nail makes it a little more difficult to show the apex placement):
Just remember that the apex is an area half way between the cuticle line and the free edge line.
Here the lines of light go a little squiffy here and there in the bottom pictures (gigi touched on this).
The line should remain the same thickness and distance from the side of the nail. If it grows wider, it means there is a bulbous or flat spot in that area that is reflecting more light. If it goes crooked then it means the circumference of the nail is getting wider/smaller the longer it gets.
And last... I go back to your french nail (ring finger)... I slapped a really cheap new free edge and smile on there to illustrate what I mean (dont laugh at the quick paint shop pro job
)...
Though I too am not into overly deep smiles, I feel that taking it deeper would have really slimmed the nail a bit... you can also see the edges come straight out from the sidewalls to the tip which also slims it a bit.
Hope this helps... there was a discussion a little while ago about apex's and light here:
http://www.samuelsweet.com/board/viewtopic.php?t=68
Keep up the good work!