I think Sims 4 is a great game. Its not the same as The Sims 1-3, but its still a great game. I think I like it more because It's different from the others. When it all comes down to it, each version had something about it that was special and not repeated by any of its counter-parts.
When playing the others I ALWAYS miss: Multitasking, Drag-and-Drop building, Push-and-Pull CASing, Having actual, unique objectives for toddlers and children to complete that are unique to their life-stage, the quirky, somewhat cartoony look and feel of the world.