I think they're all a bit...bland. The cathedral is like a castle with some trees. Nothing too intriguing. The village is good, but don't only use wood, cobble, and stone. The plane looks a little better on the inside then the out. The boat is nice. And the seaplane looks too blocky (no pun intended)
I don't believe these people. I think they're awesome! The relief details in the cathedral is perfect, the tower in the University adds a unique touch and I like the colored dome. And the use of the different shapes in your village makes the buildings look more interesting, but they also stand together as a whole. I'm pretty impressed.