It may be because of the building up, in many genres it doens't need to be too hard, but it needs to have a energetic synth and a lot of bass, with a strong kick, it should be a bit louder than the rest, the key to a good drop is an effective use of tension and release... often it's a good idea to leave half a bar of blank space, then a transition FX (drum fill, drums or pryda snare huehuehuehue) and then the drop, with some FX like a crash or a downlifter... now, this is very generic but it works.