Hello C,
We're glad you enjoy our weekly example profiles. To choose the profiles we look at a number of things: this day in history lists, who is on WikiTree already, profiles projects have sent us they'd like showcased, current events, holidays, recently deceased, and what's happening in popular culture (movies, books, etc).
As far as suggesting future choices, just post them here! I read this thread whenever a new post comes in and add it to a notebook calendar-very old school :-) But I've found it's the easiest way to keep track of everyone. We use categories a bit and a Trello board but my personal primary way of keeping track of future options as well as who we've already used, when, and why, is in my own handwriting.
Thanks for your input!
Abby