Building with my own two hands, swinging a hammer at every nail. I have had to fight with the bank over construction details because my methods are so out of the ordinary for our area. I ended up having to get the state fire marshal to agree to come inspect my home himself before the bank would release my construction funds.
The "new tech" I'm using isn't new at all. It is 'new' in that it is just now starting to mature as a technology, it is new to North America after being ignored for years or decades, or is just now becoming cost effective for the residential market.
Advanced Framing - this is what the local inspectors and bank had a problem with, despite the fact that everything I did was to code (even pictured in detail in the code itself exactly as I had built it) and was published as a best practice in publications put out by the local electrical coop. Especially cool if you can afford to do it is the Larsen truss wall.
Passivehaus quality windows from the likes of Marvin and Alpen - triple pane windows filled with noble gasses to reduce or eliminate convective coupling, films to minimize IR losses or gains, frames that isolate the surfaces on the inside of the house from those on the outside of the house with insulating materials so there is no direct path for heat.
Residential fire suppression - There are now fire suppression sprinkler heads available designed to operate at the lower pressures of residential systems and are suitable to handle potable water. I've brought utility pressure water into the house, run it through a sprinkler in every room, and then to a pressure reducer for distribution to the house. My household supply runs by all the sprinklers first; this way there is no stagnate water in the lines possibly compromising the integrity of the heads and I know that as long as all is well with the water in the house then I have a functioning fire sprinkler system ready to spring into action. The cost was very low - a couple benjamins - for the heads, extra water pipe, and fittings, and was well worth the extra piece of mind.
Affordable foams for insulation - I couldn't afford to go fully foam, but I used affordable XPS and polyiso panels to supplement the batt insulation I used. Foam seals the walls to minimize energy movement through the envelope.
LED lighting and electronic ballast fluorescent with super long life bulbs for low operation costs and high ROI.
Mini-split heat pump units for super high efficiency cooling. I'm cooling my entire house with less power than my wife's hair dryer uses. Granted, it's only 800sq ft, but pretty good even so.
Radiant floor heat using intelligent automatic variable circulation pumps and tankless water heating units. This keeps efficiencies as close to theoretical limits as possible and increases occupant comfort to minimize use and mis-use of the heating system. Provisions have also been made to incorporate alternative heat sources at a later time such as solar collectors or gasifier.
But the most unconventional thing I did was that I DO NOT COMPROMISE on standards and I sweat the DETAILS when everybody else just wants to shrug and say "good enough" or "that's not how we've always done it". A house is a big pile of little things and if each of the little things is "good enough" what you get is just a little off + just a little off + just a little off + just a little off + ... just a little off = house of crap.