Gigi-- There are so many differing opinions on the topic.
I think display is vitally important to sales but have known people who generate great sales and possess no gift for the art of display.
So, booth content is probably primary. Placement...secondary.
I know what draws ME to booths...atmosphere. If a booth looks inviting, I can spend a lot of time dawdling around to see what goodies I can unearth. But, I am a female.
I tend to overstock my booth. I feel that, if I am renting a space, I need to get my money's worth. Having said that, I know folks who say sparse decorating draws people because it does not overwhelm them.
If I see a sparse booth...I typically pass it by.
Different strokes for different folks...
I do seek out items for/ arrange a main seasonal display... and work other items around that. I also change my display around...add..take away...on a weekly basis.
My booth is eclectic. I have my Victorian items together. I have Country French together. I also decorate by color. I have pinks in one section; greens and browns in another.
This is all tricky because colors don't necessarily match style.
I am a Realtor (license in escrow at the moment) and have always known which houses would sell quickly. Atmosphere.
In saying all this I will add one more piece of info. Last week, a reporter/photographer came into our antique mall. She said she loved my booth because of its...seasonal display...which, to me, is atmosphere! So, she took a picture of it.. and some others. Every other booth I heard her comment on and saw her photograph....again-- had a welcoming atmosphere.
This week I am keeping my fingers crossed to see if my booth made it our local newspaper!!!! I put so much love and work into it...I sure hope it does.