Ooooh this is my type of thing! I absolutely LOVE both Deadmau5 and Skrillex, and here's why, starting with Deadmau5: The first song i heard was "Some Chords" (off of his album, 4x4=12), and I instantly downloaded everything I could find by him. I started off with "Vanishing Point" (my favorite song of his by far) and I went on from there. I love the compression, 128 bpm, variation and overall composition of his beats, and the fact that he overpowers and then compresses his synth and bass-lines gives his mixes a very powerful yet beautiful sound. And he just doesn't do the same old thing, he has multiple styles of mixes. In comparison, "Not Exactly" and "Professional Greifers" sound completely different, the first being an overall trance and dance experience with a calm atmosphere to it, while the other is powerful and has an overall aggressive nature and atmosphere. This in mind, I personally believe this is the result of him sorting out feelings and thoughts while in the creative process, and therefor infusing a piece of his personality in each mix. I also like his very early work, Project 56 and Get Scraped. And now for Skrillex: His music is the most mindfreaking sound I have ever heard, and it's constantly getting better. I first heard "My Name Is Skrillex", and couldn't think afterwards. Of course I downloaded his stuff too, and my favorite song to date is "Roughneck Bass [Full Flex]. I love his electro-house roots and mixes, and the glitch sound. I can't get enough of it, it's not dubstep, it's not glitch, it's not electro-house. It's a nice combination of all three, and gives him a distinct sound compared to most artsists of those genres. I can't quite grasp the concept of how he does it, but it sounds amazing! And that concludes my input.