Istanbul is by far my favorite place
I have had the opportunity to visit many places this year since I am living in Europe, and Istanbul has by far been my favorite (tied with Budapest). The city is so alive, culture and colors everywhere! If you haven't been I highly recommend it, you won't regret it!
Insider Tip:People selling things in the touristy areas can be kind of aggressive, ignoring them is the best option, second best is a wave of the hand to enforce your "no I'm not interested". I also recommend going in the off season, it is still warm and there are a LOT less people, I hate lines so this was ideal for me.