I've had a few aswell. 900SL MK1, 900SL MK3, 900SL MK5, 2x 851 strada's, 916BP 916SPS, 996SPS, 998R. They all been and gone, still have another 900SL MK1 and the 888SPS heap.
I think that's more than enough to be honest, wasted way to much wonga on all of em.
Does this count:: I used to be paid to put miles on brand new Ducati's for 2 years...... they weren't my personal propery but I could treat them like my own....... that was a good job.......