They definitely change with experiences, Dennis. Interests become hobbies become obsessions become back-up professions, for example. Logic and Mathematics were interests of mine, toe-dipping into hobbies from time to time, and then became the foundation of a second career as a Forensic Accountant, reconstructing missing records and documents from multiple sources so that clients could submit accurate tax returns. So they definitely change in real life, and that means that they should evolve in an RPG, as well. Another example: I know people who in younger life were obsessed with a particular sport, becoming good enough that they were expected to eventually turn professional; but who suddenly lost interest and turned their life in a completely different direction. It definitely changes!

Glad you found it useful! While it’s possible to use the contradictions between two or more traits as a definitive characterization, you really have to know what you’re doing or it can all fall very flat. Internal consistency is generally the far better choice, if you can manage it.