I prefer "plausibly awesome". In other words, I don't much like to fly fantasy technology, so I stay away from the DG, but I like tech that could happen in real life, even if Vegas says it probably won't, at least not anytime soon, such as the Orion nuke-pulse ships or the Perseus nuclear-thermal/electric drive vessels.
I just think fantasy tech makes spaceflight too easy. With a Heinlein-style torch drive, you can fly anywhere in the system without having to worry much about planning or precision. I get a much bigger kick out of maneuvering an Apollo vehicle right into the proper lunar orbit with delta-V to spare than I do zipping around the outer planets with reckless abandon. Feels more like a sim and less like a videogame.