Magic can do what other arts cannot: In can inspire wonder, amazement, thought.
That's THE truth and the main reason I perform.
As for the thread question, I usually don't use a pre-learned patter because I like to improvise, both with my technical solutions and presentation. That's probably the case because I don't perform professionally, nor have I ever. I'm studying hard, trying to get through college and practicing magic is a great stress reliever for me, as well as a way to express some suppressed creativity (law school can suppress a lot of things in you). I enjoy performing and I usually keep a layed-back tone, serious, but relaxed. Of course that from time to time I like to go with substance, e.g. when I'm performing Stigmata or something like that, but since most of my focus are, besides cards, rubberbands, coins and some other ordinary objects, I just don't see CMH, Jacob's Ladder, a simple coin vanish or something similar as an adequate base for some ultra-amazing, reality-questioning epiphany. I'm not saying you couldn't pull it off, it's just that I don't see myself doing it in that manner.
To be clear, I'm not talking about card effects here, which I love the most because of that versatility when it comes to presentation of any, even the simplest effects.
Also, I would like to add that you don't need a profound and ambiguous patter to give your spectators that feeling of amazement and wonder, you don't even need a complicated routine! Just doing the ACR for instance: you do a DL, slowly put the card in the middle, square everything up, lift the deck to your head level, watch it carefully, slowly say something that's related to your previous patter (e.g. if you started with the "ambitious patter", you say something like: "now...let's try to...send some of my ambition to...amaze you...to your signed card..."), while constantly scrutinizing the deck like you're expecting it to grow a pair of legs and run from your hand, then you just make the top card pop with your thumb (kind of like a pop that you do with a Pinky count) to illustrate that the magic has happened and either tell them to check out the top card or slowly lift it up yourself.
What I'm trying to say is that I believe we should just act natural and present our effects in a way that gives that perfect balance of wonder and entertainment. Sure, I could make my eyes bleed and make them scream in wonder and horror, but what's the point of that?
Magic should always be entertaining and amazing, as it should also always install at least a tiny bit of wonder inside the spectators heads, while being enjoyable both to watch and to perform, and the means like sleights, gimmicks and presentation we use to accomplish that come second to the reactions, at least in my humble opinion.