Aleatha,
The Polynesian is my favorite resort, so for me there isn't a more perfect place to stay. I find the resort very romantic and intimate with it's theming, its beach and all its meandering walkways. The palm trees and lush, colorful foliage add to its appeal. (And I love that sound of the bamboo swaying softly in a breeze) Nights are especially romantic with all the lit Tiki torches and soft background music, and the nighttime views of the GF, MK, CR, monorail and ferry while lit up are spectacular.
If the GF is more appealing to you though in its theming, you may want to consider staying there. Have never myself. We often take the walkway over to the GF...daytime and evening strolls are nice...and I have always found it busier and more crowded than the Polynesian. The only place that has ever seemed crowded to me at the Polynesian is the GCH and the volcano pool.
We have stayed in Tahiti and enjoyed its quiet location and closeness to the TTC. The walk to the GCH wasn't an issue, since we are big walkers. We've also stayed in Tokelau and prefer that longhouse.
I think 8 days will be fine for enjoying yourselves and celebrating your 30th. Congratulations to you both and many more happy years! You may not see everything, but I find 8 days enough time to have a relaxing trip and enjoy and see much. Just do some preplanning and reading before you go.
And as far as getting emotional, there are many of us that do. I hope that never changes! Enjoy!
Susie