[moxiemk1]

Absolutely. The dissonance caused by re-implimentations of standard UI elements has caused me to uninstall many phone applications, several desktop applications, and avoid purchasing a few mainstream applications.

If you don't think the stock UI works well for your application, then you either have special needs, or are wrong. Special needs can be implemented however you like, since they're by definition not handled with standard widgets. Re-implementations of standard widgets, however, immediately stand out to me, and make using an application similar to listening to out-of-tune musicians.