I have to agree with him about the sidequest thing.
Quick, get these Almanac pages! Why? To unlock inventions you can craft! Why? To hang them around the homestead! Why? Because! Also, you get a trophy.
Liberate the areas from Templar influence! Why? To get more Assassins! Why? So you can use them during the story (probably) and send them off to do missions elsewhere! Why? To get money, some items, and XP for them! Why? So they can reach Master Assassin Rank! Why? For a Trophy! Also they may last longer in a fight.
Find all the Peg Leg Trinkets! Why? To go on specific missions! Why? To get money and a cool item! Why? The cool item will help you with something that you can do quite easily! Also...Trophy!
Make sure to get the Homestead to grow! Why? So you can craft better things and unlock more recipes! Why? So you can sell things at better prices! Why? So you can get money! Why? To buy more ingredients and get more money! Why? To get better weapons even though you probably preordered the game and got Captain Kidd's sword which is one of the best weapons in the game! And even if you didn't, think about this: A Trophy!
Kill Animals! Why? To get items to sell! Why? For money, even though you have at least 3 different ways to make money. Don't forget about the Trophy!
And I'm sure you can go on and on. Still playing the game (about sequence 9 or so), but it just annoys me that the sidequests...don't give me too much motivation. I still do them because...well, I need to. That map aint going to clean itself!
I'm not exactly wasting money or see the need to spend money in this game though, not compared to AC2. In AC2, you were constantly buy little things to improve the Villa so that you could gain more money, but it never felt like you were gaining too much (until the end anyway). This changed from Brotherhood on, and making money was just so easy. For AC3, I have all this money I could be making (which isn't a lot since I don't actually send out Convoys that often), but I really have nothing to spend it on, nothing important anyway save for pouch upgrades or whatever.
Still having a blast though.