I really like your buildings, can't wait to see how the map turns out. Only criticism is your high density poor area lacks any kind of streets at all it seems, which doesn't seem too likely to me, but it still looks good and if it fits your city, that's cool! I've just always imagined poor districts as being unpaved or whatever. Or just not within the walls. They simply get built up/on top of later.

But I digress. All that is preference and personal world style! This is a great looking map so far. As for chimneys, I encounter that too in my maps. Then I look back, see I have like 500 buildings and think "hmm, imagination works!" =P