ETA: I hope it's okay to reply to something that's months old! I just saw this thread, and didn't look closely enough at the dates.
It was cancelled I believe after two or three years (maybe not that long...perhaps it got just one and a half years)
Close to two. It debuted in March 1989 and was canceled right around the start of the Gulf War, in January 1991. I actually only watched the show in reruns on BET, but I researched it because I wanted to see how long it was going to last.
I did love this show. The writing had ups and downs like all soaps, but it had strong characters and many talented and/or pretty cast members; it could be funny, and what attempts there were to do "topical" stories, like the racism when the Marshalls moved to the North Side, were above average. Another example: We've all seen a thousand "who's the daddy?" storylines involving paternity tests, but there was an ingenious "black-specific" twist in the Adam/Doreen/Martin storyline, involving the possibility of the baby having the sickle-cell trait if one or the other of the men was the real father.
Kelly Rutherford (Sam) and Anthony Addabbo (Jason) had smoking chemistry and were just a beautiful couple to look at. I know we were "supposed" to want Jason and Monique together, but I always wished Sam had been successful in stealing him away when she was pretending to be "Flame" or "Stephanie" or whatever her modeling alias was. Kelly Rutherford's Sam is exactly what, IMO, Carly of GH or Sami of DOOL should be, but never will be, because (1) they're not played by actresses with half of KR's charm, and (2) the writing enables them too much and lets them get away scot-free too often, whereas Sam always got her comeuppance and then some, and so you had more empathy for her. We weren't always being beaten over the head with how "brave and strong" she was. I really loved that character.
Jason's fake death was one of the most convincing fake-outs I've ever seen. He was absent for weeks, and I really didn't see his return coming. Shocked the hell out of me when he turned up alive at that cabin. Maybe I was more soap-naive back then, and didn't have the Internet to ruin everything for me.
Richard Roundtree was on the show but I forgot what his role was.
He was Maya's doctor father. They'd been on the run or "underground" ever since she was a little girl, and even though he was this brilliant doctor, he was having to work anonymously at a tiny free clinic, because he was wrongly accused of killing someone by causing an explosion at a lab or something. After he was cleared, he started an affair with Doreen Jackson, and she and Maya despised each other (it was kind of a similar dynamic to Kate/Roman/Sami on DOOL), and that resulted in probably the most famous Generations scene ever, the epic catfight between Doreen and Maya. "Come and get me, bitch!"
The credit sequence may be my favorite ever for a soap. It was a great concept, and the visuals and the music were beautiful. I loved how the scoring moved through various 20th century musical styles, to match the pictures of black and white people through various eras of change -- it starting out sounding like turn of the century music, then gradually became more jazzy and modern -- and the shots of the main families were saved for the very end. It was so clever and thoughtful, the way everything in that sequence sprang from the "generations" theme.
BTW, it was Jessica Gardner's evil Aunt Mary, played by the great Mina Kolb (Jeff's mother on
Curb Your Enthusiasm), who fed Jason and Monique the poisoned trifle, and also jumped out of a plane with a stolen moose head filled with diamonds. (Or was it cash? Or uranium? Whatever. Something valuable.)