Agreed! I just adore let's plays! I even tried to do my own, sadly my computer no longer works so I have to wait until I get a new one to continue.
But my favorites are Scottishduck(my first experience with let's plays), Jessie Cox, Pewdiepie, and Cry(whom I adore). Cry might be my favorite since he feels more emotion to what he is playing, similar to what I do when playing a game (which includes talking to characters who can't here you. Or yelling at monsters)
So.. Yeah 8D