Icon observation

[CONDOR]

In my limited time on "The Grid" , I have noticed that certain characters carry more favour as icons with members than others. does this reflect their popularity? It is interesting to note that very few of the later characters are used, and how popular Ruth's icon is. Harry's I can understand as he IS the boss.

Another thing is that I visualise members by their icons, which actually enhances the Spooks experience, it is a little disconcerting though to find that Ruth is stressing about her exams .

I have to confess that I quite like Adam's icon on here as the photo used doesn't look a lot like him in the series (He's found a razor for one thing) and in this picture as I have said, has more than a passing resemblance to pictures of my younger days, though I have never looked like Adam in the series.
Does the Icon trend betray future good and bad guys? or is it that you have all been on here so long that the new characters have been added after you chose the icon?