Ts2 lol but since we're discussing Ts3 vs TS4 I have to say I prefer TS4. I prefer the closed worlds (don't kill me but I love how crowded venues are in TS4, nightclubs were always dead in Ts3...), the sims' looks and the rotational play. I think Ts4 has gone back to the roots (in some ways). I know there are many features that are still missing (cars, toddlers) and we definitely need more stuff for our sims to do (sports, hobbies, etc) but if they build on this foundation the game could be great. I don't know, I cannot quite put my finger on it, but truth is I am more hooked on TS4 than I ever was on TS3.