Jazz builds beats from the top (cymbals) down while rock builds from the bottom (kick and snare) up
The conceptual starting point of a drum pattern determines its character. Jazz drumming is top-down: the ride cymbal pattern is primary; kick and snare provide asymmetrical accents or interruptions within it. Rock and electronic genres are bottom-up: the kick-snare interplay is the primary layer; hi-hat or ride fills time around it. In electronic music, four-on-the-floor kick (house/techno) is a bottom-up pattern; repeating asymmetrical builds (trance snare rolls) are also bottom-up but with different layers prioritised. Awareness of this dichotomy helps when writing: choose a primary layer first and build around it rather than filling in all layers at once.
Examples
Jazz pattern: ride on every quarter note with swing subdivision as primary; kick and snare placed sparingly for accent. House pattern: kick on every beat as primary; hi-hat fills and offbeats are secondary.
Assessment
Write one drum pattern starting from the top (cymbal-first) and one starting from the bottom (kick-first). Compare the two patterns rhythmically. Does the starting point influence the final feel?