I've spent most of my time on the 'Rise of a Dynasty' DLC, 17.9 Hours to be exact, since the DLC loads separately even though it uses or check the base games files. I know very well what the DLC does and does not include, and I will not be factoring features of the DLC in this review.
Patrician is a great nautical trading game. You buy low, travel to another city, and sell high. As you gain more money, you buy more ships so you can carry more goods. Then you can start a second Convoy(a team of ships basically), and assign it a route. A route tells the ships which cities to go to and what order to do it. You can tell them what they should buy and what they should sell in that particular city. And they'll do all that without any more input from you, and they'll be earning you money in no time.
You can even start producing goods yourself, and have dedicated ships to deliver it to another city either to sell high, or give it to another goods producer you own so they can make more complicated, and therefore more valuable goods to sell. You gain favor in a city by selling them goods that they are low on, which makes them like you more. Once they're happy enough with you, you can start buying buildings in their city, and producing goods unique to them.
You can also take up Contracts/Missions/Whatever at the Pub. This ranges from delivering a certain amount of a specific good, or even hunting down a specific pirate or rival.
One thing it's starts losing quality on is sea based combat. Most of the time, you'll just want to let the fighting resolve automatically rather than take control yourself, since it's rather boring. Once you start getting more well known in the game, your ships will be attacked by pirates more often, and sometimes not even towards you specifically. Sometimes they'll park their boats outside a cities port, attacking anyone who comes or goes. Most of the time, if you lose, they'll just take a large amount of your goods, and sometimes a ship, and let your convoy go. To counter this, you can assign specialized boats with armor and weapons to fight, protect, and even scare off pirates on occasion. You can even put cannons on your merchant boats, however, this subtracts from overall storage space, but it's worth it if a specific convoy gets attacked a lot. Sometimes though, they're just a pain in the ♥♥♥, and you'll have to send your own specialized combat convoy to take them out permanently, since no one else will do it.
There's a lot of trading to do in this game, and the DLC will add quite a bit more. I'll need to write up a review for 'Rise of a Dynasty' too, but later.
I highly recommend this game to anyone who enjoys trading games,