If you already have a stack memorized, then why go to the trouble of learning a new one?
A know the ID order isn't exactly difficult to learn, but if you have several routines using a certain order and then come to do the ID, it could throw you off.
Also, a few people have previously mentioned being hesitant on the kings etc because of the obvious flaw in the stack so perhaps it help there.
I use the original simply because that's the way I learnt it and any change would confuse me! However, as mentioned, if I had learnt through my own stack at the start, the thought of using the original wouldn't be fun.
It's one hundred percent preference really. At the end of the day, as long as the only face down card is the one they named, who cares!

"I want to do magic...but I don't want to be referred to as a magician." - A layman chatting to me about magic.