Good question. I am not sure I can give you an answer.
As mentioned, visually, it's impressive. I just think the original does a much better job of staying true to the myth the movies are portraying. Also, and again already mentioned, I remember thinking to myself "what the **** is going on right now" when watching the new version. The original is pretty damn fluid, and easier to understand (I was VERY young when I first saw it, too).
Both movies have a bit of the "cheese factor" but I found some things in the new movie downright embarrassing (i.e. The scorpions HELPING them on their quest to the underworld??? Get the **** out of here).
In short, you very well could like the movie, but it is a far cry from the original. As such, most who have seen the original, and have their hopes up, will hate this adaptation.