Did anyone ever notice how (annoyingly) the parents will pick up the toddlers, immediately put them down, then pick them back up again? This happens around town too.
One really big thing that's annoying, is it was funny at first, but whenever a female Sim goes to the hospital to give birth (I always send the Sims to the hospital), Fiona McIrish reads a book, and Stiles McGraw is always freaking out in panic mode, "OMG! SHE'S GONNA EXPLODE!" This is exactly why I got sick of Sunset Valley!
PS: I have Vista. Still great, and was brand new, release of the base game, just needs a real graphics card, as appose to onboard graphics. Once that issue is out of the way, no more LAG!