Nice macro, but the colors are detail are a little muted. I would have done a little more saturation and sharpening. It has a nice soft feel to it though.
4 - Nice colors, good potential. Criticism; definitely 640 width in this case would have helped, if the quality was an issue in not going that big (and you didn't have 'more' to incorporate) then perhaps even the inclusion of a complementary frame may have helped. Like to see that spadix sharper, although you may well be going for a 'soft look'. The shadow play is nice but if it were enhanced 'somehow', make this even better in my opinion. Nice colored spathes and spadix on what looks like an Anthurium. edit:typo