Just for the record, I'm what you would call a "hard polytheist"
A note on the animal sacrifice thing, I think it's more important to consider not the type of thing sacrificed, but the value of it. For the Romans, sacrificing a cow or a goat or whatever was giving up something that they needed. It had great value to them and therefore was a great sacrifice. Now, it wouldn't be the same. Most people are not dependant on livestock for their lives and families. Maybe we should be sacrificing computers instead (just not Windows 95, that would anger the Gods)