I really wanted to see others thoughts before I added my 2 cents worth and have come up with the following......
Specifics (peeps tend to need strict/specific non-flexible, easy to understand guidlines) transparency of rules/specifics, transparency of judging criteria (what the judges will be looking for).
To me a "themed nail comp" - the nail itself should reflect the theme EG:imagine that nail stuck through a hole and you (as an outsider) had to guess the theme. If you guess right, then the nail itself is within the theme.
(props are secondary and shoud be used only to emphasize the theme).
A "poster comp" however would emcompass the nails and props together as a "theme"
The new comp running is quite specific - toes match the footwear.
As was the previous dress a nail - nail matches the frock.
IMHO i think a whole hand/foot is the way to go (for everyone), or just one nail (for everyone), or a full set (for everyone).
My hat goes off to anyone who organises a comp (as techs, we are all artists, we all have our own original ideas) unfortunately, sometimes those fab ideas have to be confined withing guidlines that everyone has to follow.