What is a skill/aspiration/trait/career you always forget about?

I frequently forget about the photography skill, and I I have never purposely had a sim work on the DJ skill.  In terms of careers I often forget about Secret Agent and Astronaut, as well as the freelancer careers.  I also rarely have musician sims unless they need it for the career aspiration, or the child creativity aspiration.  I can;'t  remember the last time I used the Media Production skill (which I forgot about until I googled a list of skills just now).  

I always forget the University student organisations.