The roof is on and windows are in. Doesn't look too pretty yet but it looks a lot more like a house!
Here is a detail that shows a lot; Studs at 24"oc with the window sized to fit between so that minimal lumber is used. Metal hangers replace cripple studs.
Foam spray in joist bays above seal the space from air leaks. Exterior 1" foam has replaced OSB sheathing where it is not needed for structural reasons. The window header uses 2x material with polystyrene sandwiched between for more insulation value.