This Wired piece breaks down the main mattress types and what each one feels like, which is useful if you’re trying to match sleep style,.
Those “mattress type” guides always miss the stuff you feel immediately: heat and how much your partner’s movement turns into your movement. Memory foam is the classic “why am I sweating” culprit, and the slow-sink quicksand vibe is either a hug or a trap depending on how much you toss/turn.