Re: slanted walls
Sounds like some custom storage is in order. Without seeing your situation, it would be hard to offer much for suggestions.
If the ceiling slopes from side to side on the wall, then you could cut one side of a shelf unit to fit. If the ceiling slopes from front to back, then you either have to fit a cabinet to the lowest point, or have a custom cabinet built to accommodate the slope.
If you want to have shelving/cabinets hanging from the slope, then you would need to have them custom made to do so.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!