As someone who was lucky enough to get his hands on the T4 a few times I have to say that flying the Harrier was the most exciting thing I have ever done with my trousers on. Half an hour at low level and 480kt in Germany without ever going about 250' is amazing - and so is taking off and landing on tiny little tin strips in a pine forest.
I still remain to be convinced of it's effectiveness as a weapons system - it was described to me by a Sqn Ldr on 4Sqn as an "expensive artillery piece" because all that gear could only deliver 2 CBUs or 2 x 1000lb-er.
Great at airshows, though.