Once again I'll begin with the disclaimer that I always wonder what the actual prints look like. Your scanner could suck as much as my monitor does.
Looking at the whole portfolio as a group I notice a few things. I see three distinct themes: big city archtecture, old buildings, and wilderness streams. Portfolios that stick to one theme will come across stronger. Maybe just shots of the skyscrapers and the old buildings as an architecture theme or the streams and surrounding landscapes as a natural theme. Of course there are portfolios where the photographer is the theme, in which case I'd want to see a more varied selection of your work.
The other thing I see is that some of the prints have a nice snappy contrast range, while others are sort of flat (#2,3,8,9). I like the snappy one's myself; whatever your flavor, the entire portfolio should be printed in a similar contrast range.
Looking at these and other posts you obviously have an eye for composition. Your photos of moving water are your strongest; I'd like to see you work on some atypical compositions of waterfalls, streams, etc... Keep shooting, try new things, and work on the contrast.