What is the most popular things among your friends?

Yesterday went out for a restaurant visit because of a project of my team member. My boss so happened to ask " What is the most popular things among your friends? ". What a good question and how poor I am to give the answer. It's not a matter of how difficult to find a popular thing, actually it's difficult to sort out which friends I should relate to, who are really my friends? Friend itself is an important asset as a lifelong support and spiritual sharing, but as you grow up, personalities of every person start to evolve or go extremes for personal wants and life targets. For me, I am sort of splitting my personalities for private life and general social life. My personality in the private life part seems never grow much to get with the pace of others, the gap between mine and my 'used to be' friends are getting larger, and my private own self can no longer share spiritually with them. Well, I have no clues for how to keep my friends 'alive' in my circle and perhaps I should get a bit faster to chase behind them.

Luckily I have Sun.