[amyrlis]

I believe that it was in Tulkas' nature to prove his prowess & physical strength and, therefore, he willingly joined the Valar. He knew that his powers of strength would aid them against Melkor, and I personally think he enjoyed using them to subdue Melkor. I've always pictured him more simple and human-like (LARGE human that is) than the others, rubbing his large hands in front of a yellow-bearded, grinning face. The kind of man who takes great pride in physical, back-breaking work, and relishes an afternoon nap on the green grass, a doer more than a thinker. Tulkas would not be one to stand on the sidelines while the Valar struggled against Melkor, and that is why I think he made the choice on his own to join the Valar. He adds light-heartedness and an earthiness to the ranks of the Lords of the West. As to why he came last to Arda, I do not know. Perhaps it is due to his greatness and age being less than that of those who proceeded him, his spirit was still maturing.