Not quite as impressive as you chaps but here goes my history:
1st - Suzuki TS50 (soooooo slow it hurt)
2nd - Kawasaki AR125 (great fun and felt so fast but was a complete shed!)
3rd - Honda NSF125 (loved this bike, reasonably quick, very well made but after just a month of owning it I was wiped out by a Volvo)
4th - Aprilia AF1 125 (were the pistons made of cheese on this? the top end needed a re-bore and new piston every 5K miles!)
5th - Ducati Monster 600 (bargain at only £600 + £150 for new tyres, did tons of miles on it and sold it to a Desmo Due racer)
6th - Ducati 750SS (a bit of a rare one, bought it with only 600 miles on the clock, it had been stood in a barn for 11 years in imaculate condition, did 18K miles on it in 2 years then sold it on)
7th - Kawasaki ZXR750 (just selling it now, tis on ebay!)
8th - Aprilia RSVR Mille Colin Edwards Rep (just bought, bit too big for me
though)
I've also raced an SV650 and a Ducati 900SSie.