In Romantic Relationships, You’re Either a Spark-Chaser or a Long Burner.
Sara Lynn Michener

This is really good and confirmed by my experience too. The only thing I would quibble with is that there is a way in which someone can sort of the “The One” — a person so good (for you) that they make you stop wanting to date/sleep around and do the monogamous thing instead. It’s true that no one is The One in the sense that the adventure/spark will last forever with them, though. Monogamy is work but you can’t do it with just anyone (which I know you know).