Well, since you ask

I really like the mine entrance. It's a good layout. The one thing that raises a question is why there is no wall and gate around the front of the bridge - between the guard towers. They have a lot of stone, and they've put some serious effort into building defensive structures - yet they allow attackers to walk straight up to the front doors of their guard towers?

In the case of the elven tree home, the one question I have is whether elves would build a home inside a tree? Surely that goes against their nature loving instincts? Otherwise I like it. I don't think you need to beat yourself up about the style at all.