Hey, I gave them a good listen and I liked them all. Im nto an expert on this kind of music by any means, so when approaching something like this, I ask my self would I use it in the work I do? (motion design) And the answer was yes.
I definatly think you've got some talent. One thing I would comment on is across the 4 tracks, they seemed pretty simular at times, a little diversity between tracks, and in individual tracks, would make them a little more intresteing.
Definatly post some more sometime!