Compromise, and keep your cool. Too many opinions tend to confuse your thinking. Many gowns run small in size compared to everyday clothing - don't panic if you have to try on a larger size. Try different styles to see which is the most flattering to your figure type and size. Proportions are extremely important.
Larger gals can be more comfortable if the style allows a strap bra for support.
Pictures of gowns are nice to look at, but what is flattering on a model may never look the same on you. Don't judge a gown on the hanger - gowns need bodies to show the style. Although some religions require it, white is not a necessity for first weddings, nor is ivory for second weddings - choose the color that best suits your coloring. When you try on gowns, please wear undergarments - thongs don't belong. Please treat any gown that you try on as though it were your own.