I was more of a builder in Sims 3 (until Sims 4 gives us at the very least a colour wheel/Create-a-Style, I plan to only lightly build). But when I do gameplay my play style is usually a loose storyline with skill/career/collecting goals to match the theme.
For example I am playing Spellcasters who are going to be loaded up with all canon friendly skills as well as 1-2 schools to match them. I don't like the idea of every sim maxing out on every skill/school of magic/etc. I like the idea of specializations for each so they each have a sense of being unique.
I recent got a lock skill mod to prevent selected sims from learning certain skill or locking to a certain level, I find this helpful to keep a Sim canon to character. Beyond that keeping in with goal oriented tasks/aspirations/collections/careers.
I found Sims 4 on it's own, Sims learned skills I didn't want them to learn all the time, and would not abide by their likes dislikes or traits too much. So having each them more tuned to a type and specifics for focus, made the gameplay feel like it (and each sim) has/had a path. Instead of every playthrough and every Sim is more or less the same and everything learned, and no real differences between them.