It is certainly a game you to play with other online players, just for the clan support aspect and conversation, whilst you can spend hours trailing around the Caribbean trading, a lot of clans like mine spend an hour or so sailing as a fleet taking on other enemy fleets, we play on the pvp server because who really wants to lose all their stuff and then have that said winner gloat at you, no thanks. Also less stressful and more relaxing!
It is worth it in my opinion, pretty game, fair price, constantly being updated and content added, it's a good game for hardcore gamers or casual gamers alike.