When posting 3D work for critique, you want to make it as easy as possible for other people to spot problems with your work, this means posting wireframes aswell as texture flats. Being protective of your work is not
going to help you improve as an artist, and as such you want to make it easy for people to help you improve.
As an example, if I was to post this model/texture for critique, this is what I'd post:
Triangles: <number of triangles used in the model (not polygons)>
Textures: <texture types and resolutions>
Diffuse Texture :