My Inchies are mounted on 12 x 12 canvas as I collect them. I am hanging them 3 in a row vertically in a narrow section of wall that didn't really have room for anything else.
My Twinchies are decorating the side of the white bookshelves I have in my craft room - a full length book shelf will hold a lot of twinchies.
ATCs are still in binders, but I plan on pulling out some by theme (ie, laundry and kitchen) to hang together as a framed piece in those two rooms.
Chunkies and 3-D items - I just recently screwed a length of chain between some white shelves that hang in my craft room. I use metal hooks to hang cards, chunkies & other oddly shaped items from this suspended system. I really like the way it works & looks....I am wondering why it took so long to get that project started?
I try to rotate my artwork so I am always looking at something fresh - but I do have some favorites that stay out in view all the time.