I actually never really thought about it. I guess people rave so much about Seasons because for TS3 it came out pretty fast while for TS4 we're 4 years in and still no seasons but thinking about why I would want Seasons, the answer is: I don't :D
Yeah, in TS3 there wasn't much going on other than annoying weather changes and sims looking out the window when it rained or getting sunburns in summer if they spent too much time outside. I never got to try the snowboard thing because the game was always so laggy. The only cool thing I thought was sims opening their umbrellas if it was raining and they had one in their backpack.
I remember in TS2 when they introduced Seasons, they added gardening and greenhouses, I loved that so much. That would probably be one thing I would bring back: greenhouses and glass roofs. It had much more impact than TS3.
