I really like the clear plastic boxes or zip-loc bags for my projects as I can easily see the ufos that I can work on whenever I go to the shelf. The opague boxes seem to put them out of sight/out of mind; not intentionally, just get attracted to new projects and forget they are there. But then it's like a lost Christmas present when they reappear. I am very fussy about the lids of the plastic boxes though. I hate the frustration if they don't open easily. Even the dollar store boxes have some lids that open very easily so it doesn't mean you must pay a higher price.