We were a biscuit loving household when I was a kid. An average weekly biscuit haul would have included at least one packet of Clubs or Wagon Wheels (usually both) along with the more quotidian Nice biscuits and custard creams. We would put away the whole lot in a week - there was very little waste. Despite that, the biscuits were stored for freshness in a biscuit tin - my dad (it was always my dad, he was like the snack manager) would open the new packets of biscuits and tip them all into the tin together so that every jammie dodger tasted a little bit of garibaldi and vice versa. I didn't think it was yuck then - I'm not sure now.
In my house now we don't eat anywhere near as many biscuits, mostly due to my DH being a weird foreigner who would rather eat chocolate than biscuits and who doesn't have tea four times a day (how do they even hydrate, am I right?) so there's a lot of open packets sitting in the cupboard for weeks getting soft. I'm thinking it's time to get a biscuit tin. I anticipate trouble with DH, who will probably complain about the biscuit mixing issue. So I just wanted to get some opinions. Biscuit mixing: yuck or not?