[Rune Son of Bjarne]

Interesting topic indeed. . .

About the physical form, it would make sence that lesser maia would need it to really interact with the world. . .But surely the Valar and others should be powerful enough to vield their power even with out physical shape. I just think there must be more to it than interacting.

It seem like the Valar and some Maiar was perfectly capable of "shaping" Arda without physical form, the only reason for them seem to have been the love for the children as far as I can see. . .(which might not be very far). Now Melkor envied them and as said before it would only be natural for his subjects to do likewise.

I belive I belive Ulmo hardly ever had a physical form, but still managed to send messages to Elves and Men.

Why did Maia Melian have a physical shape? It could not have been to interact with elves. . .maybe so that she could interact with nature? Still it does not seem like the right explanation to me.

I guess my conclution would be that the Valar and Maia could use their powers and send messages to living beings without a physical shape. They would however need it to have direct conversations and maybe(I am not sure about this one) to inflict physical pain on them. . .

hmmm the Ring.

I don't really have any theory about Sauron's motives, but I have a few thoughts about Tolkien's.

Rings have always been a symbol of might.
Mighty kings would give his vassals rings, not only would it show the riches he possesed, but it would also symbolise the power he held over these.
Sauron does more or less the same, just in a more cunning way. The rings he gives out gives him the power rather than be a show of power.

btw. Another powerful Ring-Lord worth Mentioning would be Odin!