I'm generally a minimalist. I don't believe I own anything I can't carry at a dead run (or put into a uHaul). So, when it it comes to my desk, I try to keep the clutter down. If I can't carry it, or my wife can't ship it in a flat rate box, then I don't want it.
Here's my desk today:
Of course, next up, I'm getting a pelican case and a slim flatbed scanner. That should complete the deal.
My desk will be dead run portable.