was talking about this with a mate the other day - it is quite hard to pick up a pile of random hardstyle tunes and go play a perfect set as there are loadsa breaks n'stuff that are off timed with other records......
there is not set formulae as such for the construction - which makes it harder for the dj..... but better as an individual song IMHO
For me though - the breaks and when the beatnbass pound back in hard are one of the appealing things of Hardstyle - I feckin love it when there's an awesome beat that just slams in........ ok - some people find it stop&starty.......having many breakdowns in one track..... but I actually prefer it - gets the adrenalin going for defo!!!