I have Grand Emporium, Pet Shop (x2), Palace Cinema (x2), Parisian Restaurant, Detective Office og Brick Bank (x2). My favourite is the Parisian Restaurant. Both interior and exterior are full of details and lot of nice building techniques.
I will also recommend getting the Haunted House (although it isnt a modular, it just need small mods to fit the modular platform) and make a modular out of it. I had a lot of fun building that one. It fits a 32x32 nice. If you choose the keep the gate (I did) the pavement will be around five studs and that leaves you with a little tiny garden in the front and on both sides.
