We do like balconies. Never did an inside but have had lots of ocean view cabins over the years. Been there done that. On our cruises anymore, no balcony, no cruise.
I have no preference regarding which deck we are on as long as I can look directly down at the sea and the flying fish and not into other balconies below. Some balconies are much more private than others. Sometimes the partitions between balconies are more porous than solid. What to really watch out for, if you are into au naturel relaxing, is balconies that are set out from the ship allowing balcony occupants above to peer down upon you. One time I counted something like 17 balconies I could look into from our railing. But having others look into my balcony doesn't bother me as much as having to look into theirs.
We have no problems with motion sickness. We also prefer to be a little forward of mid-ship. We had a balcony similar to the one you have booked, a few cruises back, here is what I said about it: "The Princess Regal and Royal are the largest we have been on, the Regal was almost a new ship, it is delightful to enjoy a cruise on a vessel that has little wear and tear on it. We had a mini-suite again but this one was different in that it was forward facing with a huge balcony, about 200 Sq. Ft, billed as a premium mini. I had my doubts when we booked this as I thought it would be very windy. Not so, actually the flow of air up over the bow made this balcony more comfortable than those on the sides. I was also worried that they would lock the balcony doors once underway, not so either, our cabin attendant told me she had never heard of the forward facing balcony doors being locked shut. I was out there every day. The mini-suite itself was a little larger as well. But the sea days were real nice and we enjoyed our huge balcony immensely."
When on the side of the vessel I like balcony railings that are horizontal Iron rods, like in the old days, with the top rail of teak. That way I can sit on the balcony and receive a pretty good uninterrupted view of the sea. I don't care for the no railing types where they use Plexiglas. Usually you can't see much out of those without standing at the rail, forget sitting and watching the flying fishes play. Plexiglas, when new is okay, but usually it is clouded due U.Vs, or covered with salt spray making looking through it impractical.
Balconies come in all sorts of sizes, shapes, locations and conveniences. "Obstructed view balconies and ocean view cabins" usually means something is going to prevent you from having an uninterrupted wide angle view of the ocean. Probably means a life boat or part of one or portions of ship rigging create an eye sore of sorts. One time we had an obstructed view cabin. When we boarded, we found nothing of the sort, just a beautiful view. Unfortunately, minutes before we sailed, we found out what they were saying, the gangway was pulled and placed in front of our window. Ugg.
They say the average balcony size on the new vessels are about 9' by 6' or around 55 sq. ft. Those are okay. Some are much smaller and some much larger. Some balconies are so squished it is a joke to even call them a balcony. I like a balcony to be about 5' by 15'. If you have a mini-suite or a full suite your balcony size is commensurate with the additional size of cabin, usually. One good one was on the Royal Princess, at mid ship, we had a fairly long balcony that angled outward on a portion of it allowing views forward and aft when seated.