As there is no proof of the existence or non-existence of any God or Gods it's probably better to act as if there aren't any or that they all exist (in which case you can't satisfy them all).
That way you can live your life to it's fullest.
Being nice because you want to rather than because someone up there or in there or down there or over there tells you to.
Not putting off for the next life things you can do today.
Generally speaking there are very few religions that allow this sort of freedom.
Most people don't chose their religion they are born to it but there is an element of choice in staying there so regardless of if choose a religion from the pile or stick to the faith of your native environment you are in an organisation with a prescribed world view. With rules and a price to pay in terms of commitment of time, resources, emotion etc.
It's prepackaged, no assembly is required.
Despite being attracted to some world religions and appreciating the art, the ceremonial and architectural trapping etc I personally prefer to play life by ear.
If there is a supernatural layer to existence I imagine if it wanted me to be so constricted it wouldn't offer me so much choice and variety.