Definitely Dio-led Sabbath here. Children of the Sea is awesome.
I know I'm in the minority, but after years of listening to Child in Time, I STILL can't figure out why people love that tune so much. It's too long and quite boring through a lot of it. Not saying it's a bad tune, not at all. But I certainly can't see or understand the praise it constantly gets. The proverbial buildups are good and the main guitar solo in the middle is good, but there's a lot of goofy dead-airish noise that I just find out of place.
*shrug*