I'm sure the pros that stalk this forum will have something to say as well, but I would like to offer my personal advice, and also ask the same question as Seirei did before me; what are you going for? ArchViz, realtime game environments... your gallery doesn't really show that.
on the environments themselves, I don't want to sound harsh here, but I'm afraid I have to agree with Seirei. They're dull, boring, empty, and flat. also, the second I laid eyes on your gallery, only one word popped into my head: "BLUE", and that's not a good thing. the scenes are filled with these weird glowing blue globes that don't really make any sense, and actually none of the renders make any sense; they're just random things put in a scene.
again, please don't take this personal: I know this sounds harsh but that's just the trademark of feedback; it sounds really harsh but it's meant to improve your work, which is something i'm sure you want to do as well.
as for some advice from my part:
if you're going for realtime environment art for games, I really would suggest investing a lot of time improving your skills, from modeling over lighting to texturing, and to learn to work with an engine like the cryengine 3 or the UDK.
also, an important thing with environment art is to keep in mind that your environment has to tell a story: who lives here, what do their lives look like, what kind of person is this, and how would they treat this environment? what kinds of items would they leave behind/take with them? ask the important questions
finally, if you're going to apply for internships: when are you going to do that, and again, for which position are you going to apply, is something I would really like to know, since any advice we offer you completely depends on the answer to that question.
hope that helps