Some people might choose a side based on:
* Dominant hand: Some people prefer to have their ring on the opposite side of their dominant hand, so they can easily take it out if needed.
* Symmetry: Some people prefer to have their ring on the same side as a piercing they already have, or on the side where their face is more symmetrical.
* Style: Ultimately, it's about what you think looks best and feels most comfortable for you!
Just remember to discuss your placement options with your piercer, as they can advise on the best placement for your anatomy and desired look.