When I used to work down the back:
Michael Barrymore (Post pool party) - Very subdued, but a very pleasant guy. Came and chatted to us for a good hour or so. Almost felt sorry for him.
Kofi Annan - Former UN Secretary General. Very quiet and pleasant man. Two of the girls thought he was Morgan Freeman!
Trinny and Susannah - Same flight as Kofi Annan. Awful women. Thought they were royalty and insisted on only being spoken to through their PA.
Stelios - Nice guy, slept for the whole flight. Travelled on an ID90, cheap git!!
Since I've moved up to the pointy end:
Sheryl Crowe - Very tired, but agreed to pose for photos with cabin crew once we landed.