I never played Sims 1, so... But I did remember a bit of Sims 2 (I didn't have my own PC back in 2007-2009, but had a GameCube that eventually broke down).
Sims 2 (console only)
Pros: In-depth gameplay, various color choices despite the lack of a color wheel, little details like hair movement, and replayability value.
Cons: Loading screens (although not as bad as Sims 4), needs going down too quickly, ugly sims, and outdated clothing.
Sims 3 (computer)
Pros: In-depth gameplay, aging isn't restricted to active household, a wide variety of personality traits, its art style, and lots of things to do.
Cons: Can run poorly without Nraas mods, can't do rotational play, and routing issues in specific worlds (Isla Paradiso, I'm looking at you).
Sims 4 (once again, computer)
Pros: Traveling between worlds, and the ability to create different body shapes.
Cons: Loading screens, lack of personality and depth, watered-down gameplay, recycled features, not much humor, too easy/no consequences, lack of traits, still no slow dance, needs tons of mods to make it interesting, simulation lag, the game fights you whenever you try to make your sims mean to each other, interactions dropping from queue, unsolved bugs, art style is too cartoony/childish, all other age groups get neglected in favor of young adults, lack of clothing for males and toddlers, sims taking forever to do what I direct them to do, musical chairs, too much happy happy joy joy, sims constantly rushing to drink water/other beverages, WAY too restrictive, WAY too many stuff packs, obsession with technology, only ten emotions, absence of fear and danger, and sims not reacting to anything...
And here is the honorable mention - Sims don't do a lot of stuff together. The gameplay feels cold compared to previous iterations. In the past, children had a lot more to do, especially when playing together. And adult sims could do more things together, too. It's not even realistic. Five years later, it's still my least favorite iteration.