The one thing that generally annoy me the most is the left most whim slot (the one that takes on the colour of the current emotion), because a lot ot those whims require the sim to go to a different lot and since it can't be locked they will invariably have changed when you arrive at the lot that you could have fulfilled the whim at. Even the ones that you can do on your home lot you rarely get to fulfill because by the time you've routed to where it can be fulfilled in your own home there's a high likelyhood that your emotion will have changed and thus so will the whim.