Anyone else?@Dextersinister: Is there any other reason?
As Jl put it he seemed like more of a threat not just because he was a multiversal threat, that doesn't mean much anymore but because he portrayed as a force rather than a physical threat that could be beaten.
and not a dud force like the Darkness or whatever it was called from Buffy, he had enough of a physical presence to be a good villain.
Final Crisis Darkseid had no avatar, he simply possessed a single guy. So physically, his Pre-crisis avatar wins. But Final Crisis Darkseid had the ALE, which would give him the auto win. So I'm going to say FC Darkseid.