This is basically how I choose....
I will read through different hubs... usually by viewing the latest hubs. If I find a title that grabs my attention, I will read it. If they entertain me and I like what they write about, I will follow them. If I don't care for their style of writing, chances are good I won't.
However, even though I am following several people, I usually don't read every hub that they put out. I just don't have the time. Occassionally I will go into My Account and click on the Activitie tab and view Hubbers that I follow... from there, I will once again read through their titles. If there title draws my attention, I will read it. If not, I skip over it. However, if I found their writing to my liking before, it doesn't mean they won't write something else I am interested in. Therefore I am still following them and can catch it when I do.
Although, I will admit I do have my favorites... and those I check frequently for there stuff! ;)