Some would argue why it can't be more like IPython. :)

But agreed, good work... tab completion is very helpful when learning a language.

IPython seems to be "too heavy" for me compared to Bpython :)

Bpython is perfect for me.

The thing that soured me on bpython, after loving it for months, was the realization that I could not scroll back easily to see results of past things (aside from the most recent one). Ipython (and, even better, the qtconsole for it) does that much better.

In a console, I like bpython's interface and autocomplete suggestion interface, but being unable to scroll back and see what I did 3 commands ago was a deal killer.

I had the same feeling about IPython, and I rather liked bpython — and then I discovered DreamPie, which offers a number of features I have found useful in exploratory programming. Yes, it moves me out of both Emacs and my terminal, but it's almost worth it.