House lives at 120–130 BPM on a four-on-the-floor groove with a 909-style palette. Techno runs darker and faster at 130–150. Melodic techno and house sit around 120–125 with lush evolving pads and constant 16th hats.
Trance is 128–145 with supersaw leads and big breakdowns. Dubstep is 140 with a half-time feel. Drum & bass is 160–180 (most tracks 170–174) with breakbeats and Reese bass. Trap is 130–160 with a half-time feel, 808 sub-bass and fast hi-hat rolls.
Pick the tempo and drum pattern of your genre first — it sets the whole vibe before you write a single note.