I have my "everyday bag" which used to be a work tote, now it's my LV pochette metis. And then depending on my weekend activities I'll pick one of my other bags to use. Usually I'll try to use a bag at least once every 2 months unless it's a special occasion bag.
STOP using plastic stuffing pillows and bubble wrap! The leather has to breath! The luxury brands use that as a temporary only wrapping or stuffing. It's not meant to be used long term! Stuff with bag pillows or 100% cotton towels. Pillows fitted for the design of the bags are the best choice as they keep the shape perfectly.