Here are some of the originals I wrote. Let's start out with a few, see how it goes. All of these are solo piano, however I am also working on several songs that have vocals (by guest vocalists).

Where Light And Darkness Meet
http://www.youtube.com/watch?v=jz4REMgwkBE&fmt=18

Passionata
http://www.youtube.com/watch?v=-CyrxdZB5NE&fmt=18

για λε-λέλι [Ya leh-leli]
http://www.youtube.com/watch?v=x9XnRlQGAGc&fmt=18

Afermath
http://www.youtube.com/watch?v=LsogGXG9QPE&fmt=18

Another original, called Dismissed, can be found here (http://www.youtube.com/watch?v=V2FA7tpC_J8&fmt=18&feature=PlayList&p=75E93F8C0381D732&index=1). I am working on a re-write of this song, that will have lyrics and vocals.

The newer and much longer version of The Day You Were Born (new version) can be found here (http://www.youtube.com/watch?v=Ys-H1bfpzwE&fmt=18&feature=PlayList&p=75E93F8C0381D732&index=0).

The original version of The Day You Were Born (older, shorter version) can be found in Kerahna's flash animation (http://kerahna.deviantart.com/art/Butterfly-House-118686561), open with the key 2357.

Heres the thing...there's only so many times you can repeat the exact same 4 chords before it just starts to sound boring. I think in general, you have a good sense of music and what sounds nice but they lack exploration. For most of your songs, what you had sounded like it was just the harmony. Every time your pattern came to an end, I was expecting for the actual song to start but that never came. Felt like I was listening to a non stop prelude to a tranquil melodic piece that never came.^.^

there's only so many times you can repeat the exact same 4 chords before it just starts to sound boring
While I do agree with that, it is not uncommon in modern piano music. Comptine d'Un Autre Été: l'Apres Midi by Yann Tiersen (from the OST of Le Fabuleux Destin d'Amélie Poulain) for instance does not only repeat the same four chords throughout the song, but even the notes are identical for the accompaniment.

River Flows In You by Yiruma also has this. Where Light And Darkness Meet was built around that very song. It is unimaginative in structure because the song it was based on is also unimaginative, though I already added a lot more variation in the melody line.

While Passionata also utilises the same chords, but with very different rhythms throughout the song, you'll find the structures of all the other songs I posted to be a lot more complex, which makes me think you only listened to the first song.

Where Light and Darkness Meet
The physics of your title kind of bother me, because if light and darkness meet, the default is then light. But anyway. I agree with KaitouKudou. There just wasn't enough contrast, especially given the title. In your video info you even mention a "strak contrast," but it was starkly absent. You said that the song you based this on was unimaginative. So why would you continue in that vein?

Passionata
I liked this one, but it was kind of forgettable. It did have some cool riffs, but it never really felt like it went anywhere. GIVE ME MELODY! I'm not kidding when I say I like this, though. You've got great starting material, and I actually really want you to go back and add some real melodies or something, because I want to hear this final product. Not kidding.

για λε-λέλι
Eh.... This seems either uninspired or poorly executed. I say that because it sounds like you thought, "It'd be way sick if I could fuse more Eastern sounding music with Blues." But then the finished product just didn't match the vision. So either the initial vision was flawed, or you just haven't worked it out yet. Those kinds of musical fusions can be exhilarating and down-right awesome, though. See, for instance, these kids:
http://www.youtube.com/watch?v=IU0t50wjb6g

Aftermath
Maybe my issue is with your titles. But dude, this sounds nothing like the aftermath of any disaster on even the slightest scale. I like the idea of you adding words and vocals to this, though. Make sure to post it if you do.

In sum:
I think you're talented, and you really enjoy what you do. Maybe I'm the wrong person to critique this, because I really do not like the whole Yanni/Jon Schmidt scene, and that seems to be what you're aspiring towards. You sound a lot like them, so to each his own, I guess.