of course we want to build our own,however this is something more inbetween
adding to your current house (stay with me now) not in the basic "add alchemy lab" but in an "add 3rd floor"
I love my whiterun house,and my riften one...but they feel a little too small after seeing vindrell hall (I cant place it but that one is missing something as well)

does anyone else like this idea?

Sounds like a good idea to me, I just don't want the houses to look awkward. For example Breezehome is right next to warmaidens, it would look odd if breezehome was 4 stories and WM's was only 2.