It's also worth noting that your own creativity factors into how much you enjoy the game. If you just want to kill your targets as fast as you can, you can get close to them pretty easily and then fight them and their guards. But the real fun comes in being creative and using the environment to your advantage.

I had an absolute blast infiltrating a huge castle, avoiding dozens of guards and silently killing others. It was something like a 30 minute ordeal for me to reach the top of the castle, then descend down towards my target and get a silent kill on him. Very rewarding.