More specifically, are there any plans on making larger treehouses? I love my previous and current treehouse, but I'd like to think that there will be larger ones later on much like there are small and large cottages or modern houses.
Stoot said in regards to not just different house models, but customization in whole (meaning you can shape your houses to your liking as well as decorate!):
"This is the most important (and largest) feature we are adding to the game. We originally planned to have it in during beta, but it is very complex! (Whole new UIs, hundreds of items, wallpapers, decorations, new kinds of projects for upgrades, different flexible house "frames" which can be extended in different ways ... all do-able, just a lot of work to get right.) Don't expect it before 2012 and you will not be disappointed!"
ETA: In another thread, he mentioned housing was 3rd on their to-do list (mostly because of its magnitude) and hinted we might see such things before the end of the year.
Yup. It seems that they plan on making them very, very customizable (which is why we aren't seeing new models). :) It's probably the thing I'm most excited about as far as future features.
I'd like a dark patch, too, though I think what I want most would be at least one herb pot, an animal pen (or at least an extension of my yard with a couple more trees- as I'm finding I want an animal pen less and less), and another couple of rooms/stories added. And, of course, those missing 8 cabinet slots that my house model doesn't have like the other models of the same features and price. Heck, I might get more cabinet slots than that even, if I could. :)