What life span do you play?

I play on normal lifespan. I was thinking about long for a while, but I feel like it would take away the difficulty of the game in my game style. I play rotationally with all families in all neighborhoods and each sim gets a different aspiration/life goal. That way I can explore all aspects of the game. So, one sim is supposed to max out the culinary career, while another wants to become a superparent etc. On normal life span it is really difficult to reach the end of the career ladder (I play without cheats/mods). Especially once they hit level 7 of a career, promotions get more rare and lots die before they can make it.