Roberto, Welcome. It's good work. #1 and #2 are fine examples of high key. #3 is okay, but it doesn't come up to the level of 1 and 2. #4 is a fine piece of architectural photography that probably could stand a bit more detail in the wall to the left of the door, perhaps by cranking down the brightness slider a bit, or, better yet, using a control point in Viveza to do some localized work on the area that appears almost blown out, but which I'm sure holds more detail than is visible. #5 doesn't quite cut it. That foreground needs some detail in it. It's not the same kind of shot as #1s 1 or 2 and can't stand the blown out highlights. Still, it's hard to judge subtleties when you're looking at a .jpeg on a monitor, so I may be overstating the case.
But, all in all, very good work. Let's see more of it.