Where does playtime data come from?
Steam measures time in the background every time you launch a game, and shows it on your profile both as "total playtime" and "playtime in the last two weeks." Read together, these two numbers reveal which games were a passing curiosity and which became a lasting habit.
SteamPersona's HLTB (How Long to Beat) integration compares this raw playtime against a game's average completion time to produce playstyle labels like "speedrunner," "completionist," or "quitter."
Is playtime alone enough?
High playtime doesn't always mean "enjoyment" some games get left running in the background, while others are designed as short, dense experiences that can be fully completed even at a low hour count. That's why reading playtime alongside other signals, like completion rate and achievement progress, gives a far more reliable picture.
Looking at your own playtime breakdown makes it clear which genres you actually spend time on not what you planned to play, but what you actually did.