Our worst one was where we had booked to go to Goa for a week and then OH got stuck in a storm for days in the North Sea. BA rearranged our flight though and we decided to go ahead and just spend 5 days there. Then we went through T5 on day 2 and ended up with no luggage for the entire holiday. On the way back the aircraft went sick and we were held for hours on end at the gate in Mumbai where fellow passengers tried to encite everyone to storm the gates and demand to get out. We eventually had an overnight at an airport hotel.
Despite everything I had a great holiday. To round it up- a week after I got home a courier turned up with my luggage- and it wasn't mine. I remember I just started to laugh and couldn' t stop. I think the courier was a bit bemused by this- she just didn't know the half of it

I mean it could have been worse- at least I packed my straighteners in my cabin bag!!