1-What make(s) me happy are the things that are important.
2- My personal productivity rules ... What are yours?
3-Watching movie, reading books and running always make me happy. What make(s) you happy?
I have been too confused for 2 days about putting 's' or not after 'what'. Could you please check me out?
I always see ''what are yours?'' in internet written by people. Is that informal or something like that?