I have come to be able to save myself a lot of time, frustration, and money by being aware of what looks good on me and what doesn't... Even if I think it's cute. Here are items that do not work for me (all items taken from Walmart.com).
Any kind of shirt with a band close to the "smile." I must walk away.
Any cold shoulder shirt. Argh!
High low shirts are heck no shirts
Any shirt that has some sort of attachment (dicky, sown in, etc)
Shirts with fringe around the neck
Can you relate?