I love everything everyone has said, they all apply to my feelings regarding this game. It's like a family member who is always willing to play, at any time.
I have played Sims since the original and my favorite, by far is the Sims 4. I thought Sims 3 was the ultimate, but was replaced with Sims 4, but only after a few packs began to give the game a little more character. I love the Sims 4 now, even with all the stupid bugs, which everyone can maybe find a work around, it still doesn't make me stop playing.
Probably the best recommendation to give Sims 4, and any other sims franchise, the gameplay never ends...you have your families, neighbors with their families, the game continues as long as you have sims. Try and do Gears Of War in a never-ending scenario, without repeating play and ending the game. Double dog dare you! >:) (The last two sentences was especially for my son. :D )