Mykonos
Mykonos is known more for being the party island. The culture here is far more Americanized (think pool party in Vegas). You don’t really get the feeling that you are in Greece on this island compared to the other islands. Mykonos restaurants and bars are open pretty much 24/7. Things don’t shut down at 10 how they do elsewhere. Mykonos also does not match the level of hospitality as found on other islands; it just has less of a we’re all friends/neighbors vibe.
That being said, Mykonos is beautiful and has great beaches.
