I agree, once you have a balcony you can never go back. There is just nothing in the world like going to sleep with the balcony door open, listening to the sound of the ship moving through the ocean. Ah, the smell of the sea.
And having coffee and breakfast on the balcony in the morning, in your jammies, is sooo relaxing. So many times we would wake up, night or day, and just go outside and enjoy the beauty and the peacefulness. . .the twinkling of the stars or the shimmer of the moon on the waves. It doesn't get more romantic that that.
We never worried about getting deck chairs. . .we had our own when we wanted to sunbathe or read or sleep. . . and because of the configuration of our balcony we weren't particularly worried about what we sunbathed in. : ) (An aside here: One of our cruise friends woke up one morning, flung open the drapes to his balcony in a grand gesture to greet the day and he was stark naked. In most cases this isn't a problem but he was looking directly into a commerical shipping vessel that was passing and the guys on board thought he was pretty funny!)
Arriving in port is special, too. You wake up, go to the balcony and there before you is a small, lovely island with the lights still twinkling but the sun rising in a pretty dawn. Every afternoon we would go to the Horizon Court, pick up some cheese, crackers, veggies, shrimp and go have before dinner drinks on our balcony. We spent every sailaway like that. It was just the best. We have a balcony on our next cruise and can't wait.
We have had a window and it just isn't the same.
If you can afford it, go for the balcony (Caribe deck, especially. . .they are HUGE balconies, half covered, half open).
Hope that opinion helps you.