All of them repetative and boring exept Knowledge. With that one, every time you experience something new there more new wants. Specialy recomend it if you have a lot of expansions as each adds new stuff, like weather, supernatural creatures, pets...etc. I am ignoring skillpoint leveling part because if you have Univercity you can easily come out with all of them maxed out and start out full.

On another hand, if you don't mind repetition and want something that will allow you to generate aspiration points quickly, i think Romance is very good. By getting double romantic desires on dates (kiss and makeout, whoohoo and whoohoo in bed for example), you quickly rack up the points so you can literaly have few hundred thousands of them within few days without having to work hard for it. Problem is, like other people say, its boring as hell as its always same thing over and over again (dirty joke, pillow fight, goose, make-out, whoohoo, repeat until its a dream date, end of date). But considering alternatives, its not a bad choice as it as i said, racks up those points very very quickly leaving you to do other things at your leasure.