The game can be "House Ruled" in any way you want and that's enjoyable for you even if others here may try to marginalize your efforts. . .
Yep. We use all of the cards, because the purple cards sort of offset the red cards. I'm not a fan of the Business Center, but I don't exclude it. The Tax Office can be annoying, but it is a way for the players who've fallen behind to catch up to the leaders.
We're not particularly enamored with the Millionaires' Row expansion, but we are considering adding some of the cards like Corn Field, Vineyard, and Winery to the regular mix just to see how it goes.