Double Exposure
I think these photos are made by layering photos and messing with the opacity in photoshop. However, I don't know how you would change the opacity in only some parts of the photo. But they are really awesome and I would love to do some this semester.
Sky Photography/Clouds
I love clouds so much and pictures of them if taken in the right lighting and from the right angle make them look regal and awesome.
Awesome Portraits
One thing that's common to most of the portraits I like is the intensity of the eyes. They also have great lighting, but the part I like most from that is the awesome shadows it creates.
Black & White Light Stream
These are awesome! Pretty self explanatory though.