What is considered a good candidate for a crescent lift without implants?

Crescent lifts can often be done under local anesthesia.  However, they are best for minor adjustments in nipple shape.  They are actually a pretty weak type of lift.  They tend to tighten one portion of the areola excessively if they are used to do anything more than a minor adjustment.
There are a whole array of available lifts, from around the areola to lollipop to full lifts.  It's important to perform the right lift on the right patient!

Dear cosmo17,
it is really hard to tell without photo or in-person examination. You mentioned that you are satisfied with your breast size and that the nipples aren't pointing down, so you might be a candidate for a doughnut mastopexy. It can be done under local anesthesia.
 I would recommend you to visit a board-certified plastic surgeon for an in-person consultation. 
Daniel Barrett, MD, MHA, MS 

Certified, American Board of Plastic Surgery 

Member, Am. Society of Plastic Surgery