I generally would never even consider having a handle on my case as having a permanent handle, although it may be practical when moving the case, takes up space and is just a bit ugly. A solution would be to screw on and screw off a handle but that is both time consuming, and requires screw holes and screws...
So, I was looking at a case with a handle, infact it was the Cerberus that Kimera Industries is making (sweet case btw) and a thought struck me, "Why not just make it so you can slide the handle out?". My mind responded instantly "but what if it slid out, you wouldn't want to smash up your £500 PC because your lazy..."
This is the solution I came up with, what I've literally just now nicknamed a "Quaver Handle" (after the musical note, not the crisps, technically a beamed double quaver I believe but that's not as catchy). Essentially, a normal handle with two horizontal protrusions which have a bump in the top side, you slide them in and the bumps fit in matching recesses in the case, the weight of the case pulls down ensuring it can't come off the bumps preventing your case from sliding out the handle when being carried, but allowing the handle to easily be removed without the use of any tools or effort when it's resting on a side...
I would love to know what thoughts you guys have, I'd also be intrigued as to how thick the metal for the two horizontal pieces would have to be to not be damaged when taking the weight of the case.