Well I've finished 2 runs of this challenge, the first with a Bachelor the 2nd with a Bachelorette (who was booted in the 1st challenge).
The first one was really interesting and funny how the ending couple couldn't keep their hands off each other. Both couples from the challenge are still together and going strong (much unlike the real Bachelor/Bachelorettes, lol).
In the 1st challenge the female (Family) won the Bachelor's (Knowledge) heart by following him everywhere! She was too funny to watch. He had a thing going with a Fortune and a Popularity sim but she didn't give up. Everywhere he went, to eat, play chess, swim, she followed. She would tell him jokes and they would go at it back and forth for hours. I thought she wouldn't win because since neither had any charisma points, sometimes their jokes would end up giving them negative scores, but their "overnight" date put her over. I had the Bachelor go on an overnight date with each of the remaining three Bachelorettes (Fortune, Popularity, Family). They all were best friends and had crushes on the Bachelor and he with them (I think in love too but don't remember). What put the Family sim over was that on the overnight date, they whoo'd autonomously. Well, needles to say they're very happy now and are currently in my version of the Idiot challenge where the former Bachelor is the "idiot". They have 3 children a girl and 2 twin boys (surprised when playing the idiot challenge and you only need one spare heir )
In the 2nd challenge I used one of the females (Family) who I thought would do well but lost the Bachelor by constantly arguing with him. She didn't change and upon meeting her potentials started arguing with them too. I don't know what her problem is but she is really moody. She is even on the "nice" side so I don't get it. Well, upon meeting her potentials, she clashed with a few of them right off and some didn't find her attractive. I found it funny how most of the younger looking guys were not that interested in her but the older ones were more so. She looks sort of older like mid thirties-forties. After a while where she was in the negative with a few of the guys, one of them was making his move and they were friends pretty quickly. He is a Fortune sim. In the final two it was done to a Family sim and a Fortune sim. The family sim almost had it but she fell in love with the Fortune guy on the overnight. They are now happily married and have 2 children a boy and a girl.
Interestingly, the runner up family sim has come over (autonomously) ringing the doorbell. (I made all the former challenge players townies). He was still friends with both of them. Once he called for her and while talking to him on the phone she lost her crush. (I've never seen that happen over the phone) I guessed he "suggested" something she didn't like. Not to long after that he came over and tried to charm/suggest to her and she let him have it, lol. A few days later while he was passing the house she went over to him and started arguing with him. I guess she was still pissed about his suggestion. He argued back and lost his crush. Her husband was standing their watching the whole thing and when they got back into the house he autonomously jumped into her arms (first time he's ever done that). I guess he was happy that she picked him in the end and when she had the opportunity to cheat she didn't, lol.
I tell you, since starting a new hood, Challengeville - where everything is a challenge, my sims have gotten a lot more interesting.