We've cruised in all three categories; inside, oceanview and verandah and loved every one. Our next cruise is in a one bedroom suite with verandah (on NCL, it was a great deal we couldn't pass up), the one after is in Disney's smallest inside category. I'm sure both will be great. A few thoughts are:
1. How much to you enjoy sitting out and relaxing? Are you they type to relax out on the deck at home on a nice night or do you always mean to but never really get out there? Would you rather be hanging out in the bar or swimming at the pool?
2. How long is the cruise? On a short cruise I feel like I barely get time to check out all the public areas, let alone spend any time in the cabin. It's only on a cruise of a week or more that I feel like there's really any down time to be on the deck.
3. Verandah neighbours can be a bit of a gamble. On one cruise we had an Italian family in the cabin next to us and they must have used that cabin as a meeting place for the whole clan because there's no way four people could have made that much noise. They weren't yelling or anything and it was quiet after about nine or so, but for the whole day it sounded a bit like an Italian street party was happening on the other side of the flimsy divider. It didn't really bother us for the most part, but if we had been planning on relaxing on our verandah and enjoying the serenity of the ocean all day we would have been disappointed.
4. What time of year are you cruising? In winter it can be cool and breezy for the first day out of PC and the last day back. In summer it can be too hot to sit outside if you're on the sunny side of the ship. On our Med cruise we had perfect verandah weather the entire cruise with just light breezes and warm evenings. On our Mexican Riviera cruise it was so windy one day we could barely open the door. The verandahs are covered, but if it rains at all everything always gets wet and it takes a while to dry.
5. What's the price difference? How much is it worth to you or could the money be better spent on excursions and extras?
So there are a few factors to consider. For myself personally, I'm glad that I started cruising inside, then went to oceanview and finally verandah. That way I know for sure that I don't really "need" anything, just to be on the boat. But there are so many factors to consider that it's really an individual choice.