Are there any "standard" frameworks for user classification/categorization in terms of behaviour, frequency of use, expertise, loyalty, attitude to product etc? Examples could be: early adopter, casual user, heavy user, expert and so on.
I'm not looking for one categorization, but maybe a few that could help me understand and analyze user behavoiur and engagement, and their trends. I'd rather not reinvent the wheel.
It's more related to product development rather than strictly UX but I hope it's not too far.