Mandos is irresistibly intriguing - how can anyone resist someone with a pronouncement of Doom named after him? - and Tulkas is an admirable Vala of action, but I had to go with Ulmo. I love water forms, I've always wanted to experience snow, I miss swimming, I find rainy days a delight (and not just because they could possibly cause classes to be cancelled), and water has such astounding properties that usually escape us because we've got so used to its presence.
And then there's all those things concerning his character. He's loyal, and he makes his presence known but doesn't seek attention. That he had a (rather indirect) hand in Morgoth's eventual downfall, because he didn't stick only with the Eldar whom he knew longer and better, but also extended his watery hand to the younger of the Children of Ilúvatar, seals the deal for me.
Oh, dear. I can almost imagine a
Survivor: Valinor thread.
