one think ill say (that i WISH we had) was either hidden (or even open) storage under the steps.
if your building it put some storage either under the step tread (hinged door) or behind the step/riser - it would make a great place to hide shoes or a dust pan & brush etc.
our steps are metal so it would be tough for us to build 'em after the fact.
Heres an example of some wooden ones that someone built into a camper (after the fact)....havign to open the lid all time could be a pain, i think id rather have the storage behind a riser or under the stair tread.
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Don R.
'04 Haulmark (M42386) 42', 2 slide, 10kw -
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'04 F350 CrewCab Longbed 4x4, 50g aux tank & gear vendors dbl over