We own DVC and one of our homes is Bay Lake. I love being able to walk to MK but I always push for the 'lake' view because, to me, the Theme Park view is a parking lot view. I voted for the Poly because of nostalgia. Boulder is Ok. The buses for that area hit multi-hotels before leaving for their ultimate destination so Bay Lake and Poly are nice because you have the option of the transportation center.
I love lake view and my most favorite room we have stayed in at BLT was lake view. However, for this trip, lake view wasn’t available for renting points but there was a dedicated reservation for theme park view so I grabbed it. I’m excited to see the castle at night. Parking lot view doesn’t bother me for BLT cause I also like people watching and I think this view will give me lots of people to watch lol. All that being said, I do agree that lake view is an amazing view and, if given the choice, I would pick it over theme park view the majority of the time