My favorites are rings with bracelets being a close second. I also really love earrings and own a ton of them. Necklaces are probably my least favorite, not that I don't love beautiful necklaces. I just tend to not wear a necklace as often as I wear everything else.
Watches count too, right? I adore pretty watches (especially ones with diamonds). I have two 'good' ones that I rotate every day (an Omega constellation and a Michele mini deco), with several more on my wishlist. I never get tired of looking at pretty watches...