good question, although I'm wondering what percentage of folks on the DIS remember the first 2.
I chose ORAC-1 myself. My first trip was in summer of '82, but I was 5 and honestly can't remember a single thing about the original narration. I made a couple trips when it was good ole ORAC. While I don't have that narration memorized, what i remember likeing about it was it was a friendly voice, and it also tried to explain a little about how the people mover worked (very brief and very high level, but how it works is a very important part of the attraction)
The 3rd narration was one I never liked while it was there (always felt it was cold and harsh), but now that it's gone, I miss it. Funny how lots of things work that way. The current naration really doesn't bother me as much as it seems to bother some, but it doesn't get me excited either.