What should I put in my portfolio?

Hi all,

I was wondering what some of you thought might be
worthwhile projects to take on to put into a portfolo and present to
games companies at interviews and so on.

I'm pre-dominantly a
games programmer, having made several 2D games using C++,
Flash, etc..  I've also made two 3d games, one using
the Kaneva engine (yuck btw) and one using Ogre3D, though neither are by any means complete
(they were made to meet assessment criteria for assignments).  I've also dabbled in 3D modelling and animation, as well as digital painting, sketching
and general 2D asset creation.

I'd like to say that I'm
excellent in all those things but unfortunately I am not all that great
in the artistic side.  My question is, should I just start making games
that have only my own original content in it to demonstrate my skill
across these areas, or should I just focus on one area?

If
anyone has any ideas where I should start with such a portfolio, or can
point me towards a good article that would be excellent.  I have a
million project ideas for games I just don't really know how I should
be selecting projects or whether I should be churning out some art
assets to show off as well or what.

Any help is appreciated =D

Thanks in advance,

Slade