User blog comment:ArnoldFredrickson/Why is Phineas more popular than Ferb?/@comment-1463891-20100201185544

@FadhilPF: Look at it from the flipside. Without Phineas, Ferb wouldn't have any Big Ideas on which to use his considerable talents. Phineas and Ferb are much better as a team then either would be individually.

I can't speak for everybody else, but I like Phineas better because he's so likable and optimistic, whereas at times Ferb is just...there.