I like the way to make skills as hobbies but i think something whould make it even better. If the higher your skillpoints are the more likely it is that the sim whould do the activity autonomously. As a baker your sim whoul bake feekwently. I love the way the roommates in Discover university show of their personality by cleaning or bringing in foods all the time. I would like the sims interests to affect what they do. And I think that if you whoud get that if you make the skillbuilding activities more autonomously the more they do it.