there are some game mechanics of gaining ingame power
the majority of games use the lvl system, you gain xp and gain lvls and every lvl gives you more power (you gain skillpoints/abilities/stats depending on your school)
the other system is the skill advancement like in ultima online (dont know if another well known game uses it), you use a skill and then gain points in the specific skill
what system do you think would be the most fun/game experience?
its not related to hz or another game. Imagine your favourite game and what advancement system would fit you the most?