If it's the two of us, we prefer the mid-ship suites close to the Concierge Lounge and laundromat. When we travel with family (adult kids and grand-kiddos) we book aft suites for the larger balconies. Yes, there is a problem with soot and an uncovered balcony on Marina and Riviera deck, but being able to enjoy afternoon tea, cocktails or snacks with the fam on the balcony is wonderful. We've also booked aft suites on Emerald deck and experienced smoke from the crew smoking area on deck 7. We won't book that deck again.