As I was setting these up, I kept thinking, "I hope we don't have an earthquake!"
Above is a photo of every roll of washi paper tape that I own. This is my personal pile (though some have been brought to share with students occasionally. I usually have a pile of tapes for class use and one for personal use. It does make it easy when it comes to travel and storage!)
You can tell the ones that I use the most. My favorite designs are usually solid colors (like hot pink, orange, gold, cream) or anything with text on it (especially the pink text that comes in the French set from Marks that Ginko Papers sells.)
When I buy the washi paper tape, I usually prefer the regular size rolls (I'm not a huge fan of the skinny rolls) that I can tear down into the sizes that I want.
When it comes to storage, I have a small black, zippered soft case (that used to hold small computer stereo speakers) for on the go use. At home, I have an iris case and a 12 x 12" scrapbooking paper case. I have also stored the rolls in baskets and on pant hangers.