I can only wonder what sort of D&D game you must play if all your decisions are "easy, just a normal choice"! Are you normally in the habit of being a hobbit, or of daring dungeons in which may lurk dragons? Are you a knight in shining armor, a spell-casting sorcerer, a banisher of the undead and unholy, a Jack of Shadows?
"No, but I play one on TV!" That is fine; a touch of the amateur dramatist is certainly not amiss, and many players find that an easier way to start than vicarious participation. Ideally, I think, one should eventually encompass both abilities and be able to apply either as appropriate -- and "number-crunch gaming" and "story telling" to boot. A Dungeon Master in particular can make good use of every kind of skill in the game.
The thing is, the purely thespian touch is something one can add to any game -- and so too tight a focus on it is to lose focus on what is special about a role-playing game. Going further, one can lose sight of the game element altogether, and then one really might as well be on stage before an audience.