As soon as these starters were reveal, my friends went all-out campaigning and such on facebook, twitter, etc, on which ones they'll pick. It was funny as hell to see. Rowlet's definitely the popular one (I call it Kotori bird after seeing a crossover picture of Rowlet and Kotori), but Litten's up there too. Other than my friends, it seems like Popplio is the underdog.
Though, I'd love to see the reactions once the evolutions are revealed :3