Few days ago I received an email from Alex (Ascian) about his two tutorials dedicated to kick and snare. Overall, these are well explained tutorials which show the techniques you can use to create your own kicks, snares. For example "kick tutorial" introduces layering, EQing, Saturation, Filtering, Compression, Spectrum Analyzing.
This reminds me that at some point, definitely I'll try to create my own kick drums and release them freely or for 1000 $ each ;)
Ahh, the topic states dubstep but I would say that these techniques are universal, at least when it comes to Electronic Dance Music.