Sir Edward, once you get the hang of the controller, it will become very fluid. Entering and exiting combat is the same as locking onto and releasing targets- alld handled by the left trigger. It is possibly the best moveset I've ever played with...other games that try and use different setups for the same style of play are not as natural or intuitive.
That this guy has no super powers or god-like weapons, just an incredible grasp of parkour before there ever was such, and of course, being a deadly swordsman make him one of the best and most memorable characters in any game. Once you learn counter-kills, you'll really start with the bloodletting. At least, I sure did.
I like it when guards get pushy, talk trash to ya...don't feel at all bad about shoving the hidden blade into his stomach (or back), or using the curved dagger to dispatch your foes, or the longsword- each weapon has different kill animations depending on how you've taken him down and in what respect you're facing when you do it.
Of them all, the curved dagger is probably the coolest but ymmv. I'm glad I'm not a complete badass like him...I'd be insufferable!