Sorta in order of ownership, with an occasional pic to keep you entertained, and as faulty memory allows:
'72 Honda CB350F
Kawasaki F6. Turned into an F7 with clubmans and street tires shortly after purchase. Still one of the funnest bikes I've owned.
Hodaka ACE 100. Needed something to run around 24th St. in Chula Vista. It was fun, as long as you remembered the reversed shift pattern.
'76 Honda CB550F Bought with a crushed front end and frame. Never quite got it around to running before having to sell it.
Yamaha RD350. Had DG heads and Spec II pipes on it. Got it cheap, never appreciated it enough to get it running and sold it. I regret that.
'82 Kawasaki GPz550 Still have it, with 50K on the clock. It needs a serious 'refreshing' though.
'05 Kawasaki ZX636. What can I say. It's everything I lusted over back in the '80's.
'84 Kawasaki KR250. A bike I lusted for back in the '80's, but wasn't brought over to the US. Found it rotting in someone's back yard in Berkeley. Paid too much for it, and am
still trying to get a few parts for it from Japan. :sad
'83 Kawasaki GPz550. Yes, another. It was supposed to be a throwaway track bike. Gotta 'get around to it.'
'90-something RS125 frame with a CR80 motor. Another track bike that needs to get to the track.
'75 Honda CB400F. With BEET mag wheels. Missing a few things. Project bike.
'85 Kawasaki GPz550 Yes... A
third one. It's my favorite color combo, and it was cheap due to fairing damage, so I bought it.
'74? Yamaha MX400. A project in the works.
'76 Honda XL350 Another project in the works.
'86 Yamaha XT600 I needed something to deal with the 'quality' roads around here. This thing is great! It's like riding a couch. AND I don't have to worry about tearing my fairing lowers off on a gravel road.

Edit: Added a pic!