Im sure a lot of these have been previously mentioned but I couldnt resist putting my 2 cents in!

Pets: Ability to interact with them, give them names and ages just like the lil peeps and a lifespan so they die too. Also, the ability to have more than one pet and maybe a bigger variety: a bird, chickens, ducks, maybe even a rabbit or a horse? Oooooh, then u could get a barn and stuff.... that would be waaaaaaay neat!!

Relationships: I would like the ability to divorce and/or remarry. Sometimes my lil peeps marry cruddy lil peeps who dont want to work or seem sterile...lol... and I would like to trade that lil peep in!!! LOL... This sounds sooo bad, but hey, it is "virtual reality" not all couples stick together for life (unfortunate as that is)

New Generations: I would like to see the kids either come home from college and be able to work at home until they get married. Either that or the ability to just marry off the ones you dont leave the house to. I would like to know what they are up to later on too, maybe emails like: Hi! My wife and I just had a baby, work is great! See ya later! Something that lets me know what they are up to. I wonder about the lil peeps I didnt leave the house to.

Ability to redecorate the house more, plant flowers, maybe a garden, change the hairstyle of the lil peeps, and a store that restocks with what you need!!!!

I also saw someone posted a while back the idea of an expansion pack... THAT WOULD BE GREAT!