Good:
Models. Great that you've kept them, especially the aircraft; sod anyone who tells you otherwise.
Lighting. Very nice touch, especially since you can mess around with colour for each video.
Shelving. Not overfilled and a mix of your models, hardware and other bits make a nice backdrop. Seeing box after box on some channels makes me wonder whether they're doing it out of a warehouse.
My little niggles:
Lighting. I agree with Greenback about the aircraft, give them an LED strip or two but make it quite dim so it just highlights them without being overbearing
Hardware. Not a niggle as such (And I know you've done this before so definitely not a criticsm either) but I would just keep parity between Intel, AMD and Nvidia hardware on display.
That's my feedback that I can conjure guv. It's mostly my personal preferences so take it as you will