I played 'The Sims Complete Collection', the original game with all the expansions. Some of them were rather poor - Vacation added nothing to the game. Even the Superstar expansion did little to enhance the game. Unleashed with the 'pets' was nice (you could fill your Social requirement much quicker by just playing with a dog, as opposed to talking, entertaining, tickling, hugging and kissing a human). The thing is extremely addictive for the first ten days, as you level up and buy all the expensive stuff.
After that, it gets dull real fast. You constantly keep tabs on friends' ratings, careful not to lose one lest you get demoted at work. Hell, I used to queue up several actions all the time. My Sims always had a queue of at least half-a-dozen actions. And then of course, there were issues with pathfinding.
Very clockwork. Didn't even bother with The Sims 2 because I suspected it would be more of the same.