First one sounded fine, but nothing notable. I would say it just wants a little more variety. Try glitching, vocal sampling, putting effects on the instruments and changing them over time (like reverb or an EQ sweep).
Second song: I liked the notation of the lead synth, but the whole thing over all sounded very ruff and clippy. Watch the volume bars for clip detection (idk exactly what your DAW will look like, but it should turn red) on both the master and individual tracks. Also, it was a little long. You can only listen to the same repeated sequence so many times.
Third song: Good length, OK variance, again nothing seems strictly wrong with it, besides it gets, well, boring/repetitive after a while. Maybe I'm just not a fan of the genre, but I like the song to really grow and evolve and feature many different musical ideas.
Something to try: have a completely new instrument (grand piano, sax, guitar, plucked strings) come in for a bit of solo in the middle, and drop out the D&B for a bit. Or, start stuttering your loops for a nice glitchy feel. Variety is the main thing you seem to be missing. Using a DAW and VST's and all that means that you can keep layering on complexity and new sounds without a whole lot of effort.
Listen very to the instrumental of Glaze's tracks. There is so much going on it's an eargasm every time! Supernatural and Lost on the Moon are my favorite instrumentals to exemplify this.
http://www.youtube.com/watch?v=h3kSPHcjN34http://www.youtube.com/watch?v=t_6JKO_l9l8Good luck!