My heavy nostalgia is for 3 and the customizations available in the Create interface to change all your furniture and decorations to be whatever crazy colors and textures you wanted. I genuinely could never get tired of it, and I had to just remove it from my computer and firmly resist temptation to reinstall it to keep myself out of it.

Who cares about cleaning and decorating my actual home?! Sims 3 is so much more fun