So it's a pretty overrated feature,
I'd agree with this. I've put together about a dozen computers for people and I've never used a case with a removable tray.
Things I have liked about cases:
Both sides remove independantly of each other. The ones where the whole outer shell must come off together can be a pain.
Thumb screws to remove the panels.
Removable drive 'cages', or rails (I know some people hate rails).
Front USB ports (Firewire would be great as well).
unless maybe you have an extremely small case and monstrous hands (as I do),
You know what they say...