I regularly find myself returning to this game. so what is it that almost make it a classic?
I also like the rather simple trade system. It is not very sophisticated, but it is there and it allows me earn money when I am not looking for a fight.
The good: Lots of atmosphere, good graphics (particularly considering it's a few years now), time consuming naval battles and OK trading system.
The bad: Too few options for exploration onshore and formula-like conversation with people you run into. Sometimes missions are seemingly impossible, so keep a save-game before you start a new voyage or cross other "mile stones".
After experiencing sudden problems on several graphic cards with my old "Imperial glory" leaving me without a good naval battle game and only just recently having got hold of Empire Total War , I must say this game has filled a "naval battle gap". I think it must be the open sea atmosphere and the naval battles that probably explains why I consider it a classic.
Of course, I'd love to see people on the deck also when in first person mode, not just 3rd person, but it seems that time is ripe for a new version, so until AOP 2 is released I guess I'll keep AOP on my hard drive for a while longer.