My awesome idea for a mod would be the ability to wear workbenches, furnaces, dispensers, note blocks and jukeboxes, on your HEAD.
It would work something like this:
Workbench: You would put the crafting bench on your head, press C (or other assigned key) and it would open up a a crafting menu, making it easier to make more pickaxes when your current one has broken.
Furnace: The furnace goes onto your head, press C again, and your able to smelt ores and cooked food, on your head. Optional feature: When you smelt your health goes down by half a heart until the smelting is done.
Dispenser: Pressing C would enable you to shoot whatever is in your hand far distances (possibly work with ender pearls?)
Note Blocks: Tune with Shift+C and C to play the assigned note
Jukebox: Hold a music disk in your hand, press C and it will take the disk and play it on the jukebox (Awesome hat AND ghetto blaster!)
I don't know what else could be added so let me know!

-Kitty