What bothers me most in sci-fi is the total lack of realism when it comes to a "bad guy's" wardrobe, or furniture... stuff like the absurdity of Shinzon's costume in NEM, or the costume of the reptilian Xindi... I mean seriously... how the frak can anything be comfortable in that crap? Number one, the whole thing would take like over two hours to get into, and then, how the hell could you go to the bathroom in such a silly getup? Is it even machine washable? The whole design process of stuff like that just shows a total ignorance of what a humanoid form would consider comfortable... ESPECIALLY for a "military" uniform, which should be totally no-nonsense, save for maybe a few little badges or decorations... but nothing so absolutely absurd as in the examples above.
As for furniture... I frakking HATE it when we see the bad guy interrogate or torture someone in a frakkin' "chair of doom", which is made out of stainless steel, and has every bladed weapon known to the universe slapped onto it, to make it look fearsome, and has metal hand and foot cuffs... I mean, really? Gimme a frakkin' break... if you're gonna interrogate or torture someone, you just do it... you don't need Dr. Sinestro's chair of doom to do it. The CIA doesn't use such crap... they just use a normal chair. Besides, who makes those evil chairs, anyway? I wanna see the factory that makes them, and the packaging they come in, and the warranty card.
Same applies to any stupid "magical" weapons, like wooden staffs that just happen to emit bolts of lethal energy. Again, who the hell makes this stuff, and where is it sold? Where is the power/energy source? I want stuff that THOUGHT is put into. On Star Trek, you can envision a phaser being a real weapon, that is mass-produced in a UFP factory somewhere... we have seen phasers taken apart, and we can believe that they could be real devices, with real inner workings.
Ugh... I hate schlocky shit, lol.