Unlike your normal gear items, trinkets offer a little more interaction. Whether they are proc-based and trigger themselves in response to things you do, or on-use and need to be activated, or even just charge themselves up to give a steady buff they normally need some degree of user attention. This makes them something of a personal choice item. There are certainly those that are bad, better or brilliant but choice and playstyle often impacts trinket selection.
Below I've listed out fifteen trinkets that can take a warlock from freshly dinging 80 to the best the game has to offer. They are in a rough DPS benefit order, though that will depend on your other gear, spec and preference to some degree. So lets see what shinies await us.