Of all jewels, the ring is probably, in many senses, the most engaging... Fantasized, present in the greatest fictions (from The Lord of the Rings to the Green Lantern comics), the ring represents power, love, tradition.
In my opinion, and contrary to what one might think, the ring is probably the most difficult jewel to assume. Always very connoted, it refers to an imaginary either rather feminine or very particular, like the rock scene, the bling bling or the fans of SF...
From the simple textured ring to the samurai head mount, you will find many variations of existing rings. Here are two models of the Marc Deloche brand.
Balance the number of rings on each hand.
Avoid mixing gold and silver, especially on the same hand.
Pay attention to the proportions by avoiding rings that are too big for too thin fingers and vice versa.
Go gradually, don't go from a simple ring to a huge wolf head frame.
Avoid wearing too many rings on the hand you use the most. No matter how strong a ring is, it gets damaged - slowly but surely - by friction.
In terms of style, mix a few silver rings with a raw denim jacket or perfecto to make you look like a rocker. For a more roots style, choose models set with gems such as turquoise, labradorite, coral, opal or tiger's eye.