The high speed ferries tend to be less reliable when it's windy ( they will have more delays) but the boats are all more or less the same. Which ferry you take depends on where and when you want to go.
This year we went with Bluestar from Santorini to Paros (no delay), from Paros to Ios with Seajets (1,5 hour delay), Hellenic from Ios to Sikinos (1 hour delay), from Sikinos to Santorini with Zante (no delay)
We have used several ferry companies in Greece and have had varied experiences with each and event good/bad with the same company.
Here is a list of some of the more popular ferry companies that operate in Greece:
- Blue Start Ferries
- Hellenic Seaways
- Minoan Lines
- Sea Jets
- Aegean Speedlines
- Golden Star Ferries
- Zante Ferries
- Alpha Lines
These are some that come to mind! Hope this helps!!
Lets be honest, good beaches are the most important thing for a good vacation These are some of the best in my opinion after doing some research and looking at a bunch of pictures: Crete, Santorini, Mykonos Zakynthos. Because Crete is such a big island, they have the most options and the most variety in the types of beaches