My best holiday was not on BA - but I thought was worth mentioning:

2 nights in Hong Kong
9 nights exporing the South Island of New Zealand - amazing scenery, wine, dolphins/whales. The highlight was a 'heli-hike' on Fox Glacier
7 nights at Etu Moana in Aitutaki in the Cook Islands - just the most amazing tropical destination!
2 nights LA - The Beverly Hills Hotel.

I did this back in 2007 and would love to do something similar again, but the subsequent addition of 2 kids means this will probably have to wait (I think we took 11 flights in 3 weeks!). Also the costs when we went were much lower than I think we could get these days - I think the flights were under £1,000 (economy obviously!) and the Beverly Hills Hotel was £250 a night.