I like playing as the ottomans, in particular because of the Sipahi. It's one of the most powerful UU's, and in most every game I play I gain my winning advantage by having a cavalry rush, and so having a suped up cavalry is perfect. As a result, I've developed a strategy that extends the amount of time that the Siphai is the premier unit, and I'm wondering if anyone else has tried it. Essentially, you are turning yourself into a bank. You go to each civ in the world and offer a massive amount of gold and figure out how much GPT they have at their disposal. You then find out how little gold they are willing to get for all of their gpt. If your rep is good, you almost always make a profit. With all of their GPT gone, the enemy civs will either stay static and not gain any money (Infact, they will likely LOSE money over time) or they will readjust their science, freeing up more GPT. If you continuosly apply this method, the global tech pace is slowed to a snail's pace, and the Sipahi is top dog for decades. You also make a slight net gain in gold. What'cha think?