Well... actually...
I guess I might be a bit of an exception to your overall assumed rule, that you mentioned above?
I mean... essentially... I'm ALWAYS MUCH MORE impressed whenever an ultra-hot-genetically perfected female from the future travels back to my primitive era, and presents herself with the latest Ultra-Immersive-Holographic-Generator-Game-Technology-Console (version 2.1, or later).
Along with those ULTRA-CUTE miniature alien cat-like analog pets from the 2nd moon, of the 4th planet, of the Altair-7 system.
I mean that always impresses me much more than whenever an obnoxious, loud, over-the-top male traveler from the future tries to wave a plasma-powered-light-saber in my face, or shove his sonic-blaster up my nose, if you know what I mean.