I have as well become bored of building. I have ideas that nobody has touched before with a style that nobody has seen. I just don't have the time to put in to a build with school and what not. I mean, I could just play Call of Duty and get an adrenaline rush, or sit and get little to no contempt out of building. I don't see very good build when I go onto servers. Usually there's just these crappy unproportionate builds that have no appeal to me. And then we have your house. The most common build, and the easiest, at least that's my opinion. People gasp at a house just because they but a working door on it, a chimney, some windows, railings and symmetry. Try making a head with a working mouth, or some futuristic castle-like building from Half life.
And all these techniques for making this game less boring to you, they don't work. I've done mapping, modeling, and modding. The only one I like and still do is modeling. Learning how to do these things wasn't very fun either. All you need is a good idea. I have that, just I don't have the time to do it. I say start off trying to build a castle, then just add different ideas into it. It's what I do. Like a fortress/castle/warehouse/office building.