I mainly played just a few sims in TS2 and I brought them back into TS4 which has been very fun. Obviously, I play in a more complicated way now. In TS2, I mostly played one family the entire time that I played it and the son of the family had a love interest but they never really got to the point of actually being together before I moved onto TS3. I didn't play them in TS3 or for most of TS4. More recently though, I brought them back and with High School Years, I brought the long-lost love interest of the oldest son back so they would run into each other again. It's kind of the next chapter of the story and they are as smitten (literally) with each other as they were. He dropped everything when she showed up. The retro romance at the carnival really suits them since they are literally retro sims.
Bringing back vintage sims that you remember can be very fun. Mine weren't pre-mades but the effect was the same. That's my point.