I'm a fan of static typing (but not necessarily overly strong typing) myself, but one big reason why I use Python next to statically typed languages is to write quick and dirty cross-platform-scripts where the sloppy duck typing comes in handy. Want to throw vastly different things into a single array (sometimes not even knowing what type those things are)? No problem, it just works.

This type of quick'n'dirty throw-away coding would be a lot less convenient if Python would force a strong static type system on me.

If Python is used for "real projects" with more than a few thousand lines of code, worked on by a team, static typing totally makes sense. But there are a lot of everyday tasks where this just gets in the way.