Each people has their own preferences when it comes to listening experiences, from gamers, casual music lovers to audiophile fans, each has their own tastes and equipment.
One of the ways to determine what earphones you prefer is by first realizing what you want, do you want more bass ? or are you a treble type of person ? do you need a 7.1 headphones for surround hearing or just a regular earphone for gaming. With the numerous number of choices these days you can also search online and watch reviews on the headphones you want.
But one of the best ways to know what you want is by going to a store that offers demo units. Yes! some store has these kinds of features called demo units where you can try the earphones or headphones. This is one of the best ways because it already is right in front you, all you need to do know is to try each of them to see which fits the best for you
There area also staffs of certain stores who knows what you need, you can just tell them your preferences and they can help you and suggest some headphones / earphones for you to try, it is always good to ask for help when you need it.
Forums are also a popular choice especially there are some members who might have the same taste as you but with experience. When starting or searching this is one of the most popular options because some forum members not only have the same taste as you but they already have the experience and tried first hand what you might be considering. They also give tips on what to start depending on your budget and of course their opinions regarding the said earphones or headphones of your choice
In the end the amount of effort might be a little to much but is well worth it when you enjoy and love the new headphones / earphones you just bought specifically for your taste and as the love grows, there might be a chance that in the near future you might even upgrade your equipment yearning for more.