Mmm, in chronological order...
DHC Chipmunk,
SA Bulldog,
Cessna 152,
Grob G115E Tutor,
BAe Hawk
Piper Chieftan
Sepecat Jaguar
NA Harvard
Shorts Tucano
DB AlphaJet
Pax wise,
DH Dragon Rapide (first flight - I was 3)
Bell Jetranger
Boeing 727 (JAT)
Tupolev 154 (several times)
MD-88 (Adria)
Boeing 737 (several models)
Boeing 757 (nice BA trip in the Jump seat from Edinburgh)
Boeing 767 (Canadian)
Westland Sea King (ASW and ASR)
Aerospatiale/Westland Gazelle
747-400 and 777-200 this Christmas with the nice people at Singapore Airlines
Jaguar
Hawk
Tucano
C-130J
Andover/HS748
I've also done the world most bizarre loop and heavy landing in the Harrier sim... and flown round a giant (300ft) teddy bear on the old Jag sim at RAF Coltishall... On the new Jag sim at Colt I was a passenger(?!) on the port air intake. Now that was a strange perspective...
I think thats it, and hopefully in my next job may just be adding a few more to that list come November...

(added)
Charlie