I had a peek in the STBL, so here's a fairly complete list:
(I'm not sure if they stored any of the ribbons somewhere else randomly in the table, but I found a fairly big batch of them with the other things that were added for Generations.)
[C657] 0x5B26124A2DDA029E: Most Likely to Get Arrested
[C658] 0xFD0E02D73704E37F: Most Artistic
[C659] 0x41B904D7C54513CC: Most Likely to Have a Big Family
[C65A] 0xA00BF1514D4FACF5: Most Likely to Burn Down Their Own House
[C65B] 0x65AFA577EBA0A645: Class Clown
[C65D] 0x701A2888D92A30CD: Most Likely to get Electrocuted
[C661] 0x7D7101BC56255CAA: Most Likely to Get Married
[C667] 0x10881F0B8A5CB598: Most Likely to Hack the Military Facility
[C668] 0x62A153CF2F92AB66: Most Likely to Fulfill Their Lifetime Wish
[C669] 0xF93A281A573D2474: Most Likely to be Mediocre
[C66A] 0xF3D235797208AC3B: Most Likely to be a Millionaire
[C66B] 0xEF0180D583B09888: Most Likely to Motive Fail
[C66C] 0x888343A49A8DEFA0: Most Likely to Never Leave the House
[C66E] 0x1C7CBBB4C7604CE0: Most Likely to Write a Best-Selling Novel
[C66F] 0x06012CA88C7F05B5: Most Likely to Offend Others
[C670] 0xF7F89824C713A859: Most Popular
[C673] 0x90DBD075EC06FEBD: Most Likely to be a Rock Star
[C674] 0x8A977E9CA3B5914A: Most Likely to Save the World
[C675] 0xB3ADC939385143AB: Most Likely to Become a Sports Star
[C676] 0xF3987E2D0E93F621: Most Likely to Take Over the World
That seems to be a total of 20 different ribbons. As far as I know, they're based on traits (e.g. good sense of humour - class clown, family oriented - most likely to have a big family, computer whiz - most likely to hack the military facility, etc.)