For challenges, For me, you can't go wrong with Swarovski crystals!! My favorite colors are Crystal, Crystal AB, Rose, Crystal Silver Shade, Crystal Copper, Rosewater Opal, Violet Opal, White Opal, Violet..... The list goes on and on! (I didn't even get into the blue shades!! I love delicate to medium chunky necklaces. I do not wear many bib necklaces. I pretty much love anything that sparkles, and I love chain! I don't wear much gold, and I never wear copper, gun metal, etc. Maybe I will someday! My ears are only allergic to extremely cheap metals, so base metals are okay.
Earrings: I love dangly earrings, but they can't be much longer than 1 1/2 inches long. I am good with any kind of ear wire also.
Necklaces: Most of my necklaces are 14-16 inches long. I don't really wear long necklaces
Bracelets: I don't really know what kind of bracelets I like. I don't like them super loose, but not too small so that I can't clasp them. So a good bracelet size for me is 6 inches long.
Rings: size 5 1/2 - 6 1/2