"3. Anything else that may help"
Model Mayhem is a networking resource for internet models and photographers. Most photographers are on MM to attract models. Models want to see images they can 'relate to' in a photographer's portfolio... what does 'relate to' mean? Images they can visualize themselves in and would want to feature in their portfolios as an attraction for other photographers. In other words, images that make them look good.
Hey, you want to show off your 'art' on MM... go ahead. It's your portfolio. Will it attract models? I kinda doubt it. Who will see it? A relatively tiny segment of the population; mostly internet models, photographers, and collectors of chicks pix.
Just my opinion.