I've had various setups over the years...some were successful, some not so much. Hooking up everything all at one to use on the fly is always a real pain.
Sorry for the pic size in advance...
Shelf method #1, IKEA shelving, no systems hooked up. 2010 or so...pretty messy...
Active setup 1...2009 or so. Everything seen here was active and all you needed o do was select the audio source, pick a system on the AV switcher and get out a controller...in hindsight, probably my best setup. Sadly, my lifestyle started to change at this point and I really stopped gaming a ton...I sold much of it slowly and dismantled the setup.
This was my "boiled down" setup as of 2012...I only hooked up the NES, SNES, X'Eye and PS2. Basically the only systems I used and had left from the great purge.
Now...even that has been dissolved. I scored a small 25" CRT and a 32" LED that is upstairs in a different room that I "remote" systems off of.
So...basically...I no longer display any of them.
I will say...the BEST thing I ever bought was this:
By a long shot the easiest way to store my games. I still have this loaded to this day.