And I found the interaction is bit much vulgar in The Sims 2. Like when making out... Well, really something else.
It was much more cartoony and over the top in sims 2, first time I had a couple make out on the couch in sims 3 I thought "was that it?" it seemed so tame
I hadn't looked at sims 2 for a few years although for a time I was totally addicted to it, my niece still plays it though and I was looking at them not long ago, they were so much more animated, a lot of sims 3 animations come right out of sims 2 but they are slower somehow, when they talk in sims 2 they babble over each other none of this waiting to finish then standing about shuffling your feet for ages till somebody else speaks.
And dancing, they used the same anims in sims 3 and it looks all awkward and jerky but it just works with the sims 2 sims, I was very excited about having the smustle again when I got Supernatural until I saw one of my sims doing it, nothing like I remembered
I didn't play with the premade sims much, I did play Brandy Broke though, and had a sim marry Malcolm Landgrabb once, he had a very nice house from what I remember with an indoor pool and hot tub, two extremes of the financial scale there but both fun to play.