I haven't done or completed a lot mostly because they just don't fit into the story of the sims I'm playing. Also I rotate away from a sim so even if I've planned to see something through I just haven't gotten there yet. Like getting higher up in many, many careers... or upping/maxing out fitness on a sim that has a jet ski to see the tricks they can do with better skill. For instance I haven't seen what all the floral arrangements do.. even though I want too, so I read about it here.. Often a new pack comes along and I'm still not done exploring the last one but then I just gotta play a different way (just gotta!). At least I have many avenues to explore still when I eventually get around to it :).
Some things just don't interest me like actively running retail business, restaurant or vet clinic so I'm not sure I'll ever do them. I just want those things in my game for my sims to go to and make use of them from the customer end.
The game is packed with things I haven't done or seen yet... to me this includes the reactions of sims or all the ins and outs associated with doing something.. like some things work out differently for different sim types or in different moods or if they have better skills or traits.
