Do you keep all your Qees on?

Yes and no.

I re-attach the Qee that I have more than 1 of, the rest stay mint in their packs since the colors wear off quick and they might be an investment later.

I bought a few of the new Frenzies which I sometimes attach to Toki bags or the zipper pulls of Toki clothing. My son got the Toki gene and loves playing with them.
 
I am embarrassed to say that I do not open any of my qees; I kept all my tokidoki tags, carabiners and qees in a zip lock bag as I can be rather careless and forget where I left them.

I think the toki frenzies are nice to attach to the bags though. I love the ciao ciao frenzie on my L'amore canguro as there's also a print of ciao ciao and adios at the front. :P Matchy matchy of frenzie and print.
 
awe now i feel like i should "preserve" mine lol, i love them dangling around with me though especially the adios star one. I have noticed the color kinda wears off on the little crossbone logo on his chest :[