I have also never had a bad crew on the Babybus. And for a honeymoon, I'm sure they'd look after you. They certainly have the time to do so, and all the crews I've flown with have been friendly, warm and - as said above - interested in talking to you as a person and not just a passenger. I've had this on some other routes on BA but with nowhere near the same consistency.

BA1 over BA3 for me is a no-brainer, if possible for your logistics and day of travel.

I don't enjoy the LCY ground experience when departing nearly as much, but that's just me. I'm also one of the few who seems to like the arrivals service