I was scared out of my mind the first time I rode Wildfire. At the time I was not at all into coasters, but obviously that one ride changed it all. You know it's a good ride if it's able to turn a wimp like I was into not only a coaster connoisseur, but an avid SDC fan all around. Trust me, it's like everyone says: after the first ride you just keep coming back for more. You'll be sorry you didn't get on sooner.
As the scientist, I think the lead ride op may occasionally dress up as Hartio Harris, but I don't see it every time. It's another one of those things that was a really nice touch when the ride first opened, but now they've forgotten about it.