I think I'd have been completely overwhelmed if I'd bought the whole shebang at once. It's taken me years to slowly buy all the EPs. so I enjoyed learning about each one, one at a time. You can turn them off at start up and play a limited game until you've fully explored that particular EP.
I like my werewolves. They are strong, they can find metal, gems and insects just by hunting around, and they can eat raw fish and meat. Which means if you want a little challenge put your were onto an empty lot with just a tent and a toilet. And maybe one of those firepits you can roast stuff on. Then let the were live on what he can catch by fishing, and make himself some money by hunting gems. He can also make himself a pack by biting innocent citizens as they go about their business..... The first time I did it my were was already fully skilled, but as that turned out to be very easy to manage I might try it with a juvenile were. Some of my friends had a challenge with klepto sims to have an empty lot with just a couple of "allowed" objects and try to steal their way to the good life.