What might be true? Shinto? Islam? Hinduism? Christianity?

Have you given equal thought into those and what they say about a moral code, the afterlife, and how likely it is they are the actual true religion, or are you just asking about whatever religion you grew up with, and that people aroumd you believe in?

If the latter, have you re-read the scripture as an adult, to see if it describes an ethos you actually agree with?

If your religion has a core set of rules or ways to live your life, are their teachings something you see reflected in the actions of your fellow faithful, or more importantly, your priests (or equivilents?)