Once I'd reached the point where I could squirrel away more than 30 digits a minute in memory palaces, I still only sporadically used the techniques to memorize the phone numbers of people I actually wanted to call. I found it was just too simple to punch them into my cell phone.
Being an actor gives you a chance to play all kinds of roles, very moving and dramatic on one project, silly and girlish on another. That's the most interesting thing out this business, you get to keep reinventing yourself.