http://www.twigbox.net/mp3/entropy.mp3
This one I like because the rhythm is so different. The distorted samples sound great, but I don't think there's a strong enough snare sound. You could try a shorter snare sample with a stereo delay running at 3 beat reps- that's the dub snare sound as far as I can ascertain, but it's not a hard and fast rule!
Synthwise the pads need more spookiness & distance from the ear to make them sound less like a computer. A bit of reverb? If you use a chorus with very little modulation it can thicken up the sound without changing it too much.
I love the choppy incidentals in beats 3-4, in fact they are my favourite bit, and you could push them forward in the mix I reckon. How did you do them?
http://www.twigbox.net/mp3/limeymix2.mp3
Definitely the stronger tune- resonant harmonies on the main 2-note melody in the first part and the delayed part is great, so atmospheric.
One thing I've noticed about your tunes is they aren't really that groovy- there's generally just two notes in the main part. I have a problem with this too- what I've found useful is just to copy the bass drum sequence into a midi track that drives the bass/mid-range melody, and randomly move all the pitches about, but not the timing. Adding extra notes create interest, but you always have that underlying groove as a base.
(just thought i'd get a discussion started
)