You don't say where you are going? I find inside & oceanview can get stuffy and hot in the warm climates . A balcony is would be great where its warm .
In Alaska I would suggest an Oceanview ,because it can be chilly when at sea . Since a lot of time is spent in port I personalty think a balcony is a waste of money . Better to use the extra on excursions and other things.
Still the decision is yours.
SS Ithaca , Volendam , Mariner of the Seas (x2) , Veendam , Coral Princess , Island Princess (x3) , Emerald Princess,Sapphire Sapphire (x3),Diamond Princess